We just completed our cruise aboard RC's Adventure of the Seas and all we have to say is WOW! This is one awesome ship. Of the four cruises we have been on, this was by far the best.
The ship is laid out around a promenade deck where you can find a number of shops and bars. It is really hard to remember that you are aboard a ship when you are in there.
We started day one, a full day at sea, in the spa. The spa employees were professional and competent. We highly recommend pampering yourself and taking advantage of the hot tub and exercise rooms as well.