We had a great time; last year we were on the Galileo and this year on the Harmony G; (next year Cuba).
The Harmony G is a good ship with a good lay-out. There is a nice deck in the back but you cannot walk around the boat outside or go outside in the front of the boat (on the Galileo you cold walk around the boat outside and had a lot of outdoor space and we liked that better)
Having been to Greece the year prior, we explored on our own this year and were off the ship most days right after breakfast and returned after dinner. We wanted to get as much of the local culture as possible. I did extensive research on Trip Advisor and looking at Google Maps to see the areas we were going prior to leaving home. The islands are friendly and easy and fun to navigate.
The only excursion we did was to Delos and that was really cool. Be aware you do not have to take the same boat to and back from Delos - after we realized this we stayed an extra 2 hours to explore the island, café, museum and small shop. On Crete we hired a driver to see more of the island than just Knossos and were gone from boat 12+ hours but had a great time exploring on our own!
The service was good but better on the Galileo and overall preferred last years boat but both trips were great. The crew on the Galileo spoke much better English.
The demographics of these trips are mostly older 65-70+ ages. We were 1 of 3 younger couples (in 50s) both years we went. Last year it was a mix of Australian, European and Americans. This year a group of Americans had their own guide (private tour) and that was 60% of the boat and most all of the others were also Americans - much different each trip.
The food on the boat was really fancy and a little too "foodie" for us; we like basic food; if you like exotic food with some spices you will like it; many people were not thrilled with the meals.
If you like small ship cruising, I think this is a great company and a good value. You have to have a sense of adventure because with changing weather you may not see the islands on the schedule. Last year was very windy and the trip was much different than advertised but we went to other islands and had a great time exploring those other islands. This year there was no wind and the seas were flat the entire time and the schedule was exactly as the itinerary stated.
we were in a category P which had 2 twins, a table between the beds; a self above the beds; lots of space; large closet; safe; space under beds and space against the wall for suitcase; good size bath for a yacht boat