I've got several $49.99 blem lowers from them, an on sale pistol or two, and a decent amount of on sale ammo over the past couple of years. Never had any negative issues. Fully agree that they can be slow to ship.
Of the half dozen or so blem lowers, I've only had one where I could find the blem. It was some light tooling/machine marks on the inside and didn't affect function at all.
