I am another one without the necessary experience to compare, having been on one cruise. That said, I have a hard time imagining a better experience than I had on RCCL's Rhapsody of the Seas. Because the crew are so friendly and attentive, this ship gets so many rebookings from satisfied guests that it is developing a reputation as a "special" ship, above and beyond what one might ordinarily expect from Royal Caribbean.
On an unrelated note, Carla, I just read your old rant regarding tipping, and what the employees lives on board are like. I found it truly informative and fascinating. We tipped extra to our attendants, waiters, etc. last time, but we plan to do so a bit more the next time around.