I like that we can customize our products to fit what type of person or event is looking for it! It's easy enought where you don't have any problems using this service at all! There are some things about amplifer which makes me feel uncomfortable but nothing too big so far (if there was something really bad i would probably not use them).
We've been able to make custom items with no issues thus reducing production time by half while also allowing us better control over how they look/feel when people see their own design printed onto an item vs just having one from stock ready made.