I am so pleased with my experience with Teespring, I ordered a shirt from the YWA shop and it didn't wind up fitting me very well. I'm 5'2" so the small was still very long and a bit baggy on me. I emailed customer service and Ruel was super helpful and sorted it out very quickly.
I do a fair amount of online shopping and that can come with issues in understanding sizing especially with clothing, and I'm always so happy to find places with good customer service. I'm sure it isn't easy to keep on top of all the customer emails, and even still I was able to have a clear conversation with Teespring through email, and got help especially from Ruel!