I have never written a review on a message board before but I read the reviews of the Oosterdam before we left (some good, some bad) and I wanted to share our experience (June 16-23, 2013) because it was such a good one.
My parents took my family of 4 and my sister's family of 4 on this cruise. When we went to embark at 12:30 in Seattle it took about an hour to get on the ship.
We were pleased with our room (see cabin description). We spent the first few days at sea exploring the ship and attending some activities (the high tea was delicious, the trivia was fun). Every time I went to the gym there was only about 10 people in there- which was great. I ran on the promenade and it was not crowded- everyone else was walking. The kids spent literally hours and hours in the Lido pool (sometimes the roof was closed, sometimes open). They also liked to play ping pong and giant chess there. They also loved the views from the Crow's Nest. We played basketball a little but it was very windy. The evening entertainment was good.
Lots of storage, nice size verandah, comfortable bed. Good placement on ship- not too close or far from elevator, little motion, no noise from any public rooms.