Four of us sailed to the Eastern Caribbean on the Celebrity Reflection's (departing 4/12). It was probably my 10th cruise; most of them on Carnival or Princess. I was in Cabin 8183, and the other couple was in 8185. At our request, and they removed the partition separating the two balconies, which was very nice.
I read several reviews before we left, and I agree with the consensus. Beautiful ship with great food and service. The question I was really wanted to answer, however, was whether it was worth it to upgrade from the classic alcohol package to the premium package. I had a great perspective, because my girlfriend and I upgraded, while my brother and his wife did not. My girlfriend is 42. The rest of us are between 50 and 54. There were a few kids, few teenager, and a crowd that was mostly 40-60 (with more over 60 than under 40).
The Reflection is not a party ship. I like the classier, quieter feel, but there is also something to be said for Carnival Booze cruise. Anyway, we are not big drinkers normally, but on vacation, we tend to drink a lot. Our booking included the classic alcohol package, and it was $11/day, per person, to upgrade.