The size of the ship was no issue for us. The interior cabin is very well designed and makes good use of it's space. You can't hear your neighbors. It includes a fridge, hair dryer, ice bucket, glasses,shampoo and body wash. You need to remember to bring hair conditioner and body lotion. One of the great part of this cruise is that the staff isn't overbearing. It may have been a nice touch if our stateroom guy would have introduced himself on the first day (Like they do on Princess) and we didn't know which one was assigned to our room until the 2nd last day but that was a minor detail to us. Our room was cleaned when we put the sign to clean it and all the staff were very friendly.
We never had an issue getting lounge chairs although it rained on our one sea day. There are plenty of Jacuzzi tubs and there are three water slides. The main pool is a little small but it was never too crowded.
Embarking in Barcelona was easy. Once you pass security, there is a liquor store where you can buy alcohol and no one asked us when we embarked if we had alcohol on us.
The formal dining rooms, Taste and the Manhattan Room were great. There's a diverse food selection and the service is good. We preferred The Manhattan Room. We ate dinner at the dining room 6 out of the 7 nights and we only had to wait once and it was for 15-20 minutes. We loved the idea of anytime dinning. We would only recommend the buffet (Garden Café) for breakfast and lunch. There are not enough indoor tables for the number of people but there's tables just outside the buffet on the outdoor deck which is perfectly fine.
We saw both Legends in Concert and the Blue Man show. Both were good but just remember to book the shows in advance. Unlike on most of the other ships, the theatre is very small for the size of the ship and you may not be able to see the free shows if you don't book in advance.
Disembarkation was fine but be prepared ahead of time! You are left on your own to figure out what to do and are expected to just ask what to do. All your expenses on the cruise card will go on your credit card so that part is easy. Just make sure you pick up you luggage tags from the Atrium area (by guest services) early the day before you leave. Depending on the tag color you have, you need to pick up your bags off the ship at a certain time (Ranging from 6 am to 9 am). They run out of the 6 am and 9 am ones early. If you have a late flight, make sure you grab your orange tag (9 am) as quickly as possible. We got 7:45 am tags because they were the only ones left but left the ship at 9 am anyways. There were no issues and we got our bags no problem.
We did two shore excursions and would highly recommend both. Rome and the Coliseum included a tour guide, shuttle, audio guide, water bottle, a visit to the Trevi Fountain and Coliseum, a nice lunch (3 course with wine) and a visit to St. Peters Basilica. Florence and wine tasting at a Tuscan Castle was very good as well. The Tuscan country and the wine tasting were highlights. In Florence (and anywhere in Italy I suppose), be careful of the illegal street vendors, they can be pushy and can get aggressive if you refuse to buy something. We were told that you can be fined 1000 euros for buying something from them. Only thing that didn't impress us from Norwegian is that they try to sell you water bottles just before your shore excursion when they are very well aware that most shore excursion booked through Norwegian provide you with water bottles for free (at least both of ours did).