I have one. Just went to the range. Maybe it's me but I didn't find it too loud or too much muzzle blast. I always use full ear muffs, not just ear plugs. So maybe that's the difference. I found it fun to shoot. Don't get the idea it has NO recoil because it does. But it's not much. The cases eject a good distance but they are easy to find due to their odd shape.
It's accurate but I was able to improve on it a bit by using a Briley barrel bushing from Brownell's. I always use them on my automatics.
No real malfunctions but it did show a weird problem. The slide would lock back with one round still in th magazine. It was a consistent issue. Maybe my thumb was hitting the slide release. Either way, I ordered another mag from Ammo Supply (you can get dies, bullets and cases their really cheap). I also ordered a Wolff extra power magazine spring. They use the same springs as a Para-Ordnance. We'll see if my behavior, the magazone or the spring fixes it. Other than that, the gun is a riot to shoot.
If you like oddball calibers...this is a good pistol to play with. It's decent quality and fun to shoot.
I haven't handloaded it yet and I understand that the 2050fps is difficult to reach using available powders but you can get pretty close....2050 fps is quite something. It will penetrate almost anything.