I have one for my Girsan (Beretta 92 knockoff) it works well, although for my particular application, the grips needed a fair bit of fitting. The grips were meant for the legit Beretta 92, which has a smooth front strap, whereas the Girsan has finger grooves... it holds a flashlight no problem. I go through phases with it, I'll put it on for a while, then go back to stock grips, I think mainly due to not fitting my holster...
Ah, I was unaware that they made just the rail adapter. Looks like I learned my one thing today. I obviously have no experience with that product.
Edit: Although I did notice something kind of hilarious. On that website you linked, they also sell... wait for it... MAGAZINE CLIPS!! Like, for real! I almost spit out my coffee. I was always told there was no such thing...



























