The Getaway is a fantastic ship for 2300 people. The problem is they put 4000 on it...
In no particular order:
The HVAC system onboard seemed overwhelmed in the common areas and in the cabins it seemed they worked better or worse from day to day. The "atrium" (really just a large hole in the deck between 6 and 7) was the worst, but then again, it was always packed full of people. It was always about 80 degrees or better in there.