I'm an active duty Chief Petty Officer in the Master at Arms rate. Prior to that I was in the CT field so I can speak from experience that Pensacola is a world unto itself ;)
Two of the kids currently working for me were both dropped from BUDS for injuries and are trying to get back. From what they have told me, as well as from folks I know who have made it through, it is all in your mentality and attitude.
The Navy is what you make it. Even now I still have days where I ask myself why the hell I joined. But the good outweighes the bad.
If you need anything, please feel free to drop me a line.