Myself and DM sailed on the Solstice on Feb 21st, and we both have nothing but god things to say! We have sailed Carnival and RCI a number of times, and this was our first Celebrity cruise. Right from the beginning it was obvious that X is a step above the aforementioned mass market lines. I am 24 and DM is 52, and I was a bit concerned about the demographics of the ship. I though maybe I would be bored and there wouldn't be anyone my age. More about that later.
Embarkation - We have sailed a few times out of Port Everglades and this was the easiest embarkation we've ever had. The Solstice sails out of the new Oasis terminal so it is well equipped to handle twice as many people. From the time we got to the terminal (around 12:30) to the time we were on the ship was not more than 20 minutes, if that. Our rooms were ready at 1, and after dropping off our carry on bags, we went for lunch and did some exploring to orient ourselves with the important amenities. Our luggage arrived between 4 and 5, during the emergency drill.
Cabin - We were in cabin 1604 on the Penthouse deck. As it was "hump" room, we did have a larger balcony, however it is a forward facing balcony so it did get quite windy. The bed was near the window, we didn't really have a preference, but I will agree that the sofa could have been a bit shorter (we didn't use it at all) to give more access to the closet. As well, the above-bed cabinets were great, but had we been 3 people in a room, there wouldn't have been nearly enough space. The Aqua Class shower was pretty good, and the glass doors were really nice. Plenty of storage space in the washroom, even for two women.
Big balcony, right under pool so quite noisy, very close to elevators.