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.
REALLY quiet, plenty of strategically placed storage. Very comfortable bed, and I'm picky and usually don't sleep well the first night in a hotel, and had no trouble at all. little bit of sun in the late afternoon on the balcony, which was nice. sparkling clean, bathroom well designed as well. Only issue is lack of plugs. 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.