IIRC, these pads have glued on shims instead of having clips surrounding the pad. My shims rotated enough to where the edge of the shim was lathing into my wheel hubs. Remove the glued on shim and replace with normal ones fixed the problem.
Other than the lathing and heavy dusting, they're not bad for random track weekends. They need to be warm to bite, in the winter you'll have weak brakes until you use them a bit.