My FTP "leaked" after it's first fill about two months back. It went back to AA, who duly fixed it.
No problems since, after 2,000 pellets. Love it to bits now, beautifully designed and constructed, and despite my earlier rants on the forum I do really like this gun now!
All I need to do is to improve my personal shooting skills; I can't blame the gun for my lack of talent!
As I said above, go for it, I'd buy one!