Our first four cruises ever were on Princess and then we (actually David) read about Royal Caribbean and the Royal Promenade, the rock wall, the flowrider, the ice shows and the parades. So we jumped ship from Princess and went to Royal Caribbean.
Between June 28, 2009 and January 9, 2011, we did 9 RCI cruises, including the Oasis.
We had hesitated about going RCI because we saw a lot of comments on CruiseCritic that the food wasn't very good; we figured though to give it a try.
Right up at the front and little more movement was felt, but nothing terrible. At night, there sounded like a lot of "something" striking our back wall. Never figured out what it was. Everything was good.