This was our fourth cruise and the other three were on Disney Cruiseline, so we were concerned that Royal Caribbean wouldn't measure up. With few exceptions, we were wrong. I have written on the comparison between Disney and Royal Caribbean on a different thread, so I will keep this one on point.
We sailed on a Spring Break cruise on Liberty of the Seas, and our family of five was split into two oceanview staterooms because we booked late and that was the only option We were lucky in that there was only one room between us, so the separation wasn't too bad. We are on deck 6 in rooms 6672 and 6676 - both rooms are great, great balconies, good placement on ship for the two of us that get motion sick.
Pros of Liberty of the Seas:
Room was great; no issues; We had three people staying in it; great balcony; good placement on ship in the aft section. No complaints about this room or location at all! Being on sixth floor is great because you can take the stairs everywhere instead of waiting for elevators. No noise from above or below.