Dealt with them before. 3 or 4 transactions. No problems.
On the blem uppers... They aren't. I got a 16" spiral stainless MLok that shoots & looks just fine.
I think they just call them blems to run them on sale.
I have it on good authority that PSA blems are not actual blems 9 out of 10 times either. We have a guy here that has visited their shop numerous times and two more that live close by. Each of these guys said they have been told by PSA workers, that if a box comes in with even a corner damaged they mark the whole box down as a blem. Same with if one during the inspection is scratched, whole unit is marked as blems. I've heard this about other AR companies as well, so it would only make sense.