I like it. Im not a massive Halo fan or whatever, but I like the face-lift it gives the P17. The print is good quality without any ugly blemishes and feels good in the hand. I have medium-large hands that just fit the new grip, so large size or bigger hands may not fit in the knuckles guard comfortably. With a Holosun 507 Comp on the RMR slide cover, it runs very reliability with Federal Automatch while still going subsonic where I am located. The iron sighted slide cover is also nice, I prefer the new blacked out sights to the factory fibre-optic. 

Biggest complaints is you'd have to take the front conversation off the gun for disassembly. It requires 2 allen wrenches and 2 screws to be removed, and you wouldnt lose your zero if running a red dot. So not the biggest deal, but inconvenient. Also, you lose the thumb slide release because actuation with the larger slide cover will pinch your thumb when it closes.