They have been much like the flu cold...you get the problem and after awhile the problem(s) go away. They were purchased from my favorite supplier and almost immediately the p/u tube developed a hole, believe it or not, all but one gasket, the seats, & one pressure relief...and you'd think that was all.
Tonight, I went to tap a new batch (Mississippi IPA) and it had gone flat...AND spoiled!!! Another bad seat. I suppose I am a bit impatient when it comes to these things, but I really get PO'ed when somthing happens to my brew!! ;D ;D
All repalcement parts were appropriate types and replaced carefully...Maybe just a run of bad luck!