If you are not in the building you want, ask if there are rooms available in any of the three buildings. We've been put in a location we didn't want and the CM at check-in was great about showing me the options and letting me decide where I would be happy. One word of advice, make sure they keep the original room locked so it doesn't get given away while you are discussing the move. I've had that happen before.
Even when I don't end up where I THOUGHT I wanted to be, I've always been happy with where we stayed. At CBR, we requested Trinidad North, but ended up in Jamaica (TN was totally booked). I loved it there. The building was close to a resort exit, we had a corner room (two big windows), the ice machine and stairs were right around the corner and it was very quiet. My kids ended up not liking the main pool so the distance wasn't an issue and the walk to OPR was beautiful.