we were in 2520 for one of our first cruises...very very loud!!!!If you are a light sleeper, particularly if you go to sleep prior to 1230, I would avoid this stateroom at all costs...
It is directly below one of the nighttime clubs, specifically one that plays loud thumping music well into the night (1 am)...I think this specific stateroom may be directly below the actual sound system in the club...
On subsequent cruises after the one we stayed in 2520, this stateroom always seemed to be available at the last minute....we tend to book our shorter cruises 6-8 weeks in advance....TA would always call me with this stateroom as a choice....
In addition, I'm not fond of the actual fwd location, and prefer aft near elevators as being closer to most of the venues we used most....