I just assembled 5 w/o any problems or misfits. I didn't see any blemishes or buggers in the finish and all the holes were in the right places and correct sizes. I used Brownells' LPKs with the ALG triggers and results are excellent.
Average price on 10 including shipping and FFL fees was $58 each.
They also package the Anderson quite often. For example the lower and a lower parts kit or the lower with 5 Pmags, always great prices if that is what you want.
I recently just got 2 from PSA for 113$ shipped. I'm still waiting on the rest of my parts but this week one should be complete. Looks ok finish wise but ill have to report back once I assemble it.
I've handled a few Anderson lowers before and the fit & finish looks pretty good. Keep in mind that, due to the coating they use on some of their receivers, the finish can appear a bit shinier than your typical mil-spec matte anodization.