Wouldn't use them for our own personal cars as there is far more knowledgable people i would rather put my car in the hands of And prefer to have it live mapped ......But have taken a few shit box's there for cheap set up's as its local, sometimes they come out ok other times they aint had a clue so have ended up taking them down to grove who sort it in 5 minutes

And from others i have heard if you don't know what your on about they like to try and sell you some stuff My mate got stitched up first hand, and there was nothing wrong with his engine