I dó have one its part of my Tau collection.
They're very well made. Trigger feals very clinical almost like an E trigger
It has surprisingly little recoil. Very nice light to cock. 300 bar system. Finish not as good as Steyr etc but good. Cilinders tend to slowly empty themselves. Especially when left screwed onto the gun. But all czech pcps do that so it seems, my aeron had it to.
So the design in itself is very good.
I have the full length and its a bit (front)heavy for me. Allthough I do not have issues with normal length LP10, Morini, Tau 7 etc so I guess its just built like that.
I also had to shim the front sight cause I couldnt get it adjusted anywhere near the bull.
Had to readjust trigger from new cause it wouldnt always cock.
Its also ónly accurate with chinese pellets. Normal match brands dont group
When firing, I feel quite a strong blow of air near my shooting hand. Havent tested where it comes from. Can be muzzle brake too.(it has very large slots)
Some parts arent readily availabe. I couldnt buy an M grip. Those were out of stock. It was either S or L.
So it might very well be that it dóes have some design flaws. It may also very well be that it has a leaky seal here or there from new causing that weird blow of air and weird pellet preference (had similar issues with my new mk300. Sent it in for update and they found some damaged seals. After replacement, grouping improved greatly). So I'd ónly buy it if yr a bit handy yrself. I díd forward all above feedback directly to Tau as well so I hope they've done something with it.
You can also look at the Aeron Spider if yr looking for non-standard and non-steyr priced pistols. But you can expect similar 'fun' as with Tau (mine has been back to Aeron twice for quarantee repair of regulator).