I have sung the praises of Celebrity ever since I was wowed on a 2010 transatlantic cruise on the Equinox. Well, I will sing them no more after experiencing the Constellation 3/31-4/5/14. And to add insult to injury, my travel companion was a first-time cruiser. I had to apologize profusely throughout the 5-night cruise. Thanks, Celebrity!
*Food, cold cold food. The "hot" food in the Oceanview Cafe was consistently cool and in some cases cold. I think they never allowed their refrigerated food to warm up before serving. The same goes for room service (we only did it once because ice cold eggs are not very appetizing).
*Not enough staff for the onslaught of passengers. Perhaps, there were enough staff but they simply weren't organized. One staffer told me that the passenger load was unusually high. As a result, finding a table in any eating venue besides the restaurants often meant sharing it with dirty dishes. Except for the Aqua Spa Cafe, the food was rather unexceptional, often dried out and repetitive (though I did enjoy the Indian food the most since it consistently was above par with the rest of the food).
Right above the Oceanview Cafe. My roommate did hear early morning footsteps as they prepared for the daily onslaught of passengers. I never did. However, it also sits above your balcony so you do hear it out there on occasion. For a Concierge Class room, I didn't find it any different than a regular cabin, though you pay more. Wouldn't do that again. The afternoon appetizers were a joke, the linens nothing special.