What makes a great cruise? Possibly the food, the destinations, the service and the entertainment. Well Celebrity scored on three out of four, but let itself down badly with the fourth. But more about that later.We booked our fifth cruise, the first with Celebrity and the first with two friends on the Constellation for a fortnight in the Baltics. Travelling from the North West of England were a little worried about making a cross-country journey to Harwich, as we had always travelled to Southampton previously, but we needn't have worried as the journey was straight forward. We spent the day and night in Cambridge prior to embarcation and that got us off to a great start.I don't know who ordered our weather, but whoever it was, I would like to thank them from the bottom of my heart. Apart from a wet and windy first day at sea, a cloudy day in Helsinki and an hour or two of light drizzle on the second day in St. Petersburg, the weather was absolutely beautiful with shorts and sandals the order of the day, and I know that is not always the case in that part of the world.Have recently been on a cruise which took me to Lisbon, which I found rather disappointing, I was a little apprehensive of visiting cities, and large capital cities at that. I shouldn't have worried, as with one possible exception, everywhere was clean, enjoyable and very impressive. Our first stop was Copenhagen, Denmark, and on a warm, sunny day it was a pleasure to wander the streets and see the sights. The highlight was a boat trip around the city, with a couple of drop-on drop-off stops available. Although an expensive city (one large and three small beers costing £17), the boat trip was real value for money at about £7 pp for over a one hour journey. Other highlights were seeing the Little Mermaid statue, that really lives up to its name Little, but is within 5 minute walk from where the ship berthed and the four-building Royal Palace, the Royal yacht and the sentries at the palace, one of which nearly made my wife nearly wet herself when she stepped too close for a photo.We sailed on to Warnemunde in the old East Germany the following day, and what a bonus this turned out to be. Never having heard of the place, I expected very little, but it was a charming little seaside resort with a beautiful beach, a lighthouse that can be climbed to give great views, and many quaint, little shops at prices more like those we are used to, unlike the larger Scandiavian cities. If you want souvenirs or clothing for yourself this is the place to buy to protect your wallet!We returned to the ship for lunch (Hey it might be cheaper than Copenhagen but its free) Back on board), before going into Rostock by train. This is a 20 minute train journey but not a bit expensive, and as you would expect in Germany, it was clean and bang on time. (Take note British Rail). Again I had no expectations of Rostock but it was a charming town with beautiful architecture, and a character all of its own. Having called in Tourist Information, we were told of tour of the town in a mini-bus with English speaking guide, and had it just between the 4 of us. The tour was very informative, even including where the site of the Stasi jail had been. It made us want to revisit some of the sights on foot later (not the Stasi jail), and as the ship didn't sail that night until 9.30, we had plenty of time to wander at leisure. Back on board the set meal times were cancelled, and with everyone turning up for open seating at roughly the same time, it was a bit chaotic, but that didn't spoil a great day.Another sea day followed, and then on to Helsinki, Finland. This was by far the most disappointing of the destinations, but perhaps that was not all Helsinki's fault, It was a public holiday and very few places were open, plus the weather was overcast and uninviting. A fellow guest at dinner who had been before said that we hadn't seen it at its best, but you can say as you find, and a return to Heksinki for me is extremle unlikely. we returned to the ship early for a swim.After another time change (the 3rd.), It was arrival at St. Petersburg. now this was the only stop we had made plans for before leaving. With the excursions from Celebrity ridiculously expensive, we had planned to do our own thing everywhere but in St.P., due to the necessity of obtaining a visa. We contacted a Russian travel firm in St.P., on the internet who offered two day tours to include all the major and important sights. We chose T.J. Travel, who unlike their rivals Optima were extremely flexible and accomodating and had a notice board whereby other guests from the same ship could join your group, thus bringing down the cost greatly. Tatyana, their contact, and a right little cracker as well, would ask if you were happy for others to join your group, before confirming wqith them, and we were joined by acouple from Northern Ireland, a couple from London and a couple from Houston, Texas. This cut the cost pp by about 40%, and we all met up on the first sea day and got on very well indeed. In fact it was the perfect sized group for the two days to follow. Now I can't praise too highly the role played by T.J. Travel, they were in constant touch before we left home, giving information on the immigration procedure and the itinerary, which was very flexible and allowed imput from us if there was something special we wanted to see. All this and they didn't want any deposit or any payment until the second day, with a5% discount for cash. Amazing, and I defy anyone to find a better and more cost-efficient two days in St. P. At all times we were in the presence of English speakin guide, and in an air-conditioned 20 seater mini-bus.We started with a tour of the city, with several photo stops and then a 30 minute journey by hydrofoil to the Peterhof Gardens, which is simply breathtaking - a beautiful sunny day in the most beautiful gardens you can imagine, with fountains by the hundred. Then it was on to St. Catherine's Palace, where we were told everything IS gold. And boy did we see some gold!  It took the best part of 2.5 hours to see the sights bothinside and outside of the palace. Because of traffic problems, we were unable to take a subway ride and finished off day 1 with a visit to a shop which was open specially for us and greeted with vodka, tea/coffee and truffles. Day 2 included visits to the Peter and Paul fortress, the Church of the Spilled Blood (the one with all those brightly-covered onion domes), the famous St.Petersburg pie shop for lunch, and after a visit to the famous Aurora warship, the rest of the afternoon spent at magnificant Hermitage Museum. Now there is nothing I can say that can begin to describe the Hermitage. Everything that has been written about the place is true and so many times we just gaxed at each other and said "wow!". What a two days and what a climax to the visit. Amazing!The next day it was Tallin, Estonia, and this had to be a let down after the wonders of Russia, right? Wrong. The old town was beautiful, and although a bit hilly with cobbled streets, it was another fabulous adventure. The city walls and towers were exquisite, the buildings and churches lovely and a big market square where you could relax with a coffee in the beautiful sunshine. I even had a try at archery near the main church, with the old medieval robes on. For the first time here we had alittle problem with currency as neither euros or dollars were widely accepted, but there were plenty of "currency exchange shops" available to cange your cash to the local currency.After a hectic 4 days it was good to have a relaxing sea day to follow, before a 2-day stop in Stockholm, Sweden. Right next to the ships berth, was a drop-on, drop-ff boat that took you around the majority of sights, and a two-day pass on this was cheaper than the ship's shuttle bus and the drop-on, drop-off bus. A bit of a no brainer then. The boat had 6 or 7 stops including the old town, the Royal palace and the Vasa Museum. The changing of the guard at the Royal Palace was definitely worth seeing , and there was no charge. The city again was beautiful, spotless and the weather again lovely and warm.Another day at sea and then Oslo, Norway. This was the only place on the itinerary that I had been to before, but it was all I remembered and more. With the ship's berth right by the castle it was easy to get anywhere, including the sculpture park which is easile accessed by tram(every 10 minutes). The Royal Palace, the casle and the beautiful city centre were all must-see on another sunny day.And so after another day at sea, it was back to Harwich. The destinations were lovely and I wouln't have missed them for the world. Life-lasting memories. But what about the ship itself.?The Celebreity Constellation is a beautiful ship and all the crew I met (waiters. stewards etc.) were first class- polite,helpful and conscientious. The fittings aboard were exceptional and the food above average. But the entertainment? Oh dear-it was abysmal. From a Cruise Director who was so smarmy I'm sure he would have eaten himself if he could, the whole entertainment package was lacking. The ship's singers and dancers got better with each performance, but there were only 3 over 14 nights. (P & ) and Cunard do 3 on a 7 night cruise), however the turns in the theatre were with 1 possible exception, well below an acceptable level. You got the impresson that the entertainment budget had been cut to the bone, as some nights the theatre was only showing a movie (despite the fact there was a cinema on board), and others passenger participation in acts (cringe!) were put on to avoid paying professional cabaret. Of the acts that were on not one was even mildly famous or even ever heard of, whilst the films at the cinema were pathetic. I tried 2 but walked out early on both. Although I am not one of those people who rush from one venue to another on days at sea to catch a quiz here and a demonstration there, I spoke to some that do, and they even that selection was poor.So, to sum up I'd say,Destinations   9.5/10 (Remember HelsinkiWeather         10/10 Ship                9/10Food               8/10Entertainment   1/10A great cruise but come on Celebrity, Get that entertainment package right. I think I would lovr to return to the Baltics, but without reassurances over the entertainment it would not be with Celebrity.