My 25 Avenger leaked 150-200 psi a day when I got it. I shot it a bit and then returned it to Air Venturi for repair. They were pleasant about it and I got it back, no leaking, about 5 weeks after I sent it to them and about a week ago. I initially degassed it and set the regulator at about 1600 psi and it shot 25.4 grain JSBs at about 800 fps. Heavies were slower at a little over 700 fps. I turned it up after getting it back to 2300-2400 psi and now get just over 900 fps on 25.4s and about 820 on 33.95 gr heavies. It likes FX 25.4s a little better than 25.39 JSB kings. Both the FX and Heavies shoot one hole groups at 33 yards (the limit of my backyard range) when I do my part. I like the accuracy and power a lot.
I put a Donny FL adapter on it although I never had signs of clipping. I have not put a suppressor on it yet but I probably will. I messed around and made one out of an old sprinkler today but It is noticably not in line with the barrel so I only dry fired through it. It does surpress the noise.
My trigger is definitely not the best of the guns I own. My only other PCP is a Prod and it's trigger is much better straight out of the box. I have maxed out the weight, travel, and sear engagement screws and my trigger is still a little heavier than I'd like but the bigger deal is the creep. It is significant. But I've adjusted and still get some good groups, at least for me. I will probably try polishing the sear engagement surfaces. I've had success with that on powder burners (and I know it can cause an accidental discharge if I am not careful).
I've been pleasantly surprised with the ease of changing the velocity and the consistenty good accuracy. Mine does not need more hammer pressure for velocity - even at a regulator setting of 2400, but I tried a bit more to determine that and did see a slight, maybe 3fps, increase from 1 turn. I did turn and a half anyway and velocity didn't really go up further but group size went down noticably. It was shooting 3/8 to 1/2 inch groups and went down to 1/4 inch or so with the pellets it likes best, occasionally with King 25.39.