It's hard to find a negative thing with PA
It's hard to find a negative thing with PA because their mantra is customer service. That said, I bought a refurbished rifle on the (indirect) advice of BB on their own site that states you should trust a refurb over new because these units have been screened by TOP people (paraphrasing) and given a good bill of health. My rifle, a .22 Avenge-X had some signs of previous issues which included some mangling of screws and a bizarre hammer spring adjustment... but it still shot well. Until it didn't hold air, which did give me some angst. This was my first PCP and some might forgive me for being a bit irritated, but the warranty was 3 months and I didn't even shoot the gun until spring, which was well past that time. So, I have to fix this thing on my own and information on the mechanicals of the gun are sketchy at best. As it turns out, seals on these guns are awful and there is no conceivable way to reseal without a full factory O-package, which is what I eventually bought. Ace Hardware had a few O-rings, but there is absolutely no way to reseal the entire unit without a package. The good news is that while I was languishing in the backorder chaos of a firing valve, I went ahead and just put the seals in (which had dropped in price by 60%) and it holds air perfectly and shoots like a champ again. One of the things that chapped me a bit was that I found a bellinger washer all crushed up in the firing valve area and couldn't determine where it came from or how to replace it from the parts diagram. AirVenturi figured out that I'd left the "wave washer" installed behind the pellet probe loose and it had migrated all the way into the hammer area, smashing it to bits and causing one of my original problems. THAT was almost certainly my bad from when I switched barrels from the original .22 to .177 (an awesome feature) but didn't know or remember that there was a loose piece in the area. Yeah, be mindful of that stupid washer and you'll have only the crappy seals to deal with. The sparcity of information dictates that I tell you that the reseal package includes a knock valve seal as well as the two base seals of the pressure gauges, so the only real possibility of a pressure leak not addressed by the package comes with the fill probe check valve... which is still on back order. MY lack of fill probe sealing was ultimately found to be a split O-ring that seals the base of the check valve to the probe, just one of the many rubber-oriented quality control issues with this unit. On disassembly, you'll find one great seal and the next RIGHT NEXT TO IT is hardened and square -- the same seal, just apparently different chemistries. Replace 'em all and be aware that Captain O-ring now has reseal packages available if you're not confident with the factory stuff. I have three factory kits in the range kit now and the gun has been holding 4K pressure without a whisper for 2 months since the total reseal. Dang. I wish it was still camping season, but the bugs at 30 yards that got a new lease on life won't complain. BTW Benjamin Single-Die pellets in .22 and .177 are absolutely positively the best for this gun at 1600 reg pressure, shot at 9500 feet altitude. It shouldn't make any difference with a PCP but my TX sure hated life out there.