i bought a set of cheap rear discs with the bearings pressed in. Car failed MOT on BOTH rear bearings, took the wheels off and the nut provided with the discs had stripped the thread on the stub axle.
Ohh and the back of the bearing collapsed and half the bearing was left on the stub axle when we removed the disc.
I, from now on will only go for genuine REAR discs/bearings as I have no issues with these (apart from the price)