For sure some of the kits are crappy but also they only address some of the problems with the poorly designed folding motors/mechanism. The looseness if the cone portion, tiny lock pins, the heavy fit of the manual release, the small size of the ring gear teeth, don't get fixed with the kit even if it's a quality one.

__________________
1988 325is (purchased new) sold
2004 X5 3.0 2005 X3 2.5
2008 X5 3.0 (new to me)