I ordered a white graphic tee from the guys at redbubble, and they really cared to get me the right thing! I ordered a size up because I was worried it'd be too small, but ended up overcompensating and it being too big. I let redbubble know and they sent me a replacement, free of charge! The process was quick and the form on the website was very convenient and easy to fill out.
The only reason I gave them four stars was because the material of the tee could be better; it was a bit thin. But other than that, the design turned out great and they were very customer-froendly!