My husband and I took the Infinity transatlantic with the express purpose to relax after a stressful work year. it worked! I loved the days at sea, and was almost sad to see land.
I am pleased with Celebrity, and very much enjoyed the low-key nature of the boat. No loud announcements, no overly pushy sales pitches. Food was good, not great, service was excellent (and unobtrusive at the pool while always being available if interested). I was surprised by the reasonable price of the drinks. The most outrageous prices were on the martinis, but even those were pretty comparable to the prices in local clubs. Wine was pretty expensive - perhaps a few dollars more a bottle than a local fine restaurant.
Entertainment was a little too "Branson" for me, but well done for those that like big production shows and glitzy singers/musicians.
Activities were great- lots of trivia, zumba class, other dance classes, lectures, culinary demonstrations, silly crew/guest game shows, etc. always something going on.
Cabin was excellent - super quiet, lovely little balcony for a sea breeze and sit, clean, plenty of storage, and well designed to not feel cramped. I think deck 7 is pretty ideal - 3 floors up to the pool, aquaspa, solarium, and buffet, 3 floors above the main dining room. can walk to either, but also was not a long wait for the elevators at any time.
TV was pretty awful - very few channels coming through, and would go out a lot. one free movie a day on the tv; otherwise pay movies. Would have liked a movie theater (they eliminated in the renovation of the ship).
My only other complaint (and it's not unique) is the pricing of the shore excursions, and the lack of information about doing a port by yourself. My particular complaint is that they did not tell us that there is a shuttle bus at the Zeebruge port which brings you to the closest train station into Bruges, and picks up you from it, for 16 euros round trip. This I'm sure is because they want you to take their 'Bruges on your own" trip for something like $54/person, but it's pretty weasly to not provide you with any information about alternate transportation. Same with options at Ft. Lauderdale and Harwich, England.
We will definitely cruise again, and would not hesitate to take Celebrity again.