(Update: The folks at Hipstamatic were fast (just a few hours) to acknowledge the error and agreed to ship another set of prints. Translation: Great customer service.)
Maybe you see it, maybe you don't. The paper they print the photos on is Fujifilm Fujicolor Crystal Archive Paper. A gripe I have with the results is not the quality of the color or the resolution but that there are particular areas of every photo that have creases or wrinkles in them. Small, but kind of offputting. I'll be contacting CS at Hipstamatic to see what they say. Maybe it's a problem with shipping.