I have had 3 (160 front and back and a 180 front)
I thought all of them were crap, they didnt have any bite or any holding power, one leaked, I hit another on a rock and it un-did the hose.
however, I tried waynios 160 one and it was soooo powerful, waay better than my avid.
so when they work, they work well, but otherwise they are a pain