I've bought plenty of stuff from them over the last year or 2 and they have always showed up. I just got an email from the PSA CEO the other day explaining their shipping software problems and that they've got it running now and everything is back on track, while at the same time, I've not yet got shipping notification for my stuff that I bought on 8/11/16.........go figure!
I don't think I've always received one honestly. It's here a day later when they do ship, so there's that