I have and use one. It's a good decent solid mount. I've checked the alignment of the rings with Kokopelli gage bars and they line up perfectly. Now I don't shoot PRS competition matches so I can't attest to that. But I think it is a very good much lower cost alternative mount.
I have sold quite a few to customers, and sell optics with them installed. No complaints yet! I'd love to be your guy if you need another in the future