They had to reprint my Tendril tucks 4 times. Luckily they were on top of it and I didn't get all 5,000 screwed up and shipped to me. Still, at Q1 I had probably a gross with small imperfections in the end.
With Aurum, they really did a great job. Still, I came across of number of decks I couldn't claim to be top notch and those ended up as my factory seconds. The only way to fully guarantee the "perfection" of the finicky laser cut deck was to have them do all those completely by hand from start to finish, and they had to toss out more than a few.
It is annoying when that stuff happens, but how you approach USPCC as a designer makes a difference I think. If you are super involved, polite, have some common sense and understanding it seems like they work a little harder for you. Maybe I'm just lucky but my experience with their custom team has been stellar, and I have tossed some insane stuff at them which few, if any, other people do.