II found it wonderful to be at sea, even though we had dense fog for 4-5 of the 7 days.
Properly planned, it's a wonderful way to do nothing, or stay busy for a week. Unfortunately, the only other cruise we've taken was on Crystal. Cunard's QM2 suffers greatly by comparison. It's a nice experience and I would do it again, although my wife found the crowded conditions to be a turn off. If you're planning to go I would be prepared for a number of things, in no particular order:
1. It's crowded. Our key cards didn't work and there was a half hour wait on the line at the Purser's Office (service desk) to straighten it out. No one from the crew came to speak with anyone on line to speed things up, offer us a drink, or commiserate, which we would have expected on a fancier boat . It was a poor introduction.