Others have done a _wonderful_ job of reviewing this cruise and their advice was very useful in letting us know what to expect. I'll just add things that either weren't mentioned or I would have preferred more emphasis on (or perhaps I just dismissed to quickly)...
My wife and I sailed the "Outer Loop "B" cruise at the end of August 2014. It was our 4th cruise and was very different from any of the other "big box" cruises we'd done (Celebrity to Caribbean and Alaska, Royal Caribbean to Caribbean).
We are both 50 and there were perhaps 5 other couples and a few singles traveling with their parents younger. Everyone else was older with an average age of late 60’s (?). But the average health/fitness was definitely better than other cruises we've been on (especially Alaska which had a lot of scooters).
Room was very nice. Not quite as large as those we've had on the "big ships", but perfectly acceptable. The bathroom and shower did seem a little smaller (and the room's ceiling was a bit lower?), but otherwise fine. One item to note: the bathroom floor is raised about 8 inches which means anyone over 6'4" is going to be bending over a bit in the shower. I'm 6' and didn't have any problems with it.