Just wondering if anyone has tried them and what you think.

Pretty good. Not up to the quality of extreme, but pretty good. Last season before Bedford I was having problems with lefts and rights. I would be moving my sight every day. It ended up that I looked at the sight and the green pins were longer than the red pins. Viper sent me new pins, so I cannot say much, they treated me well.

guy that ownes them was a machinest for extreme for years, ther identical to an extreme.