Used it for a few games now, and I must say I've had mixed experience. 

Price is a bit too high for only chams TBH. 

GUI:

very basic but easy to use

bug: doesn't work properly on stretched resolutions

Chams:

Work ok, but the reach of the chams could be wayyyyyy better.

FPS: 

didn't drop any FPS 

Thanks for reading my short review :D 

Like would be appreciated.

Stompy 

If by reach you mean the distance at which it renders then no not really, csgo does not network player information until they are within a certain distance of you, which also means there's no way to draw chams further away other than playing on servers that have sv_occlude_players set to 0