Love Sticker Mule, but not their shirts

This is my fourth shirt produced by Sticker Mule, and while I love everything else I have done via them, I would not recommend their shirt printing—and I was so hoping I could. The registration is off (they printed a white under base that I did not provide, which is fair enough, but at least make it register!), and the shirt—described as navy—is so dark as to be, essentially, black. Maybe others have been happy with their results. I have not. I won't have them make me shirts again.