I've been a member of BlackSector for just about a year now. I have bought the CS:GO Full hacks a few times now and I can say they're great. The in-game menu itself is very thorough and everything seems to work great. On top of that, before you inject, it shows the status (detected/undectected) of the hack which let's you know that you're always safe.
Great hacks and the BlackSector team is great also. Looking forward to the Rust hacks to release.
-GBFR