My parents took my family on the Oasis so we could spend Thanksgiving together. I've never had much of an interest in cruising, and my husband was a little concerned about feeling "stuck" in the middle of the sea with a crowd of 5000 other people, so we were hesitant at first.
All of our fears were unfounded. The ship was lovely, and never felt crowded, even though this was supposedly a very full holiday cruise. There were a lot of kids, but since I have kids, I didn't mind it. I found the rooms to be bigger than I expected, though ours over the Boardwalk was a little noisy during the Aquatheater shows.
The shows were great-- our favorite was the ice-skating show. We also loved Come Fly With Me. The Headliner was great and called our kids up for a hug! CATS was weird, but since we were in the front row, my kids loved when the performers would play with their shoes.
Nice cabin, kept very clean by the staff (Kelvin). Did not like the noise sometimes from the Aquatheater, but other than that, I had no complaints. I liked the location and being able to see down onto the Boardwalk (and also the ocean aft of the ship).