It's OK, The print area is notably not glossy and I think with logo mugs, it kind of ruins the effect. However I suspect it would be fine for full-colour prints.
I love this product cause it so accurately describes me some mornings well must mornings. I would never wear a shirt that says instant a -hole just add alcohol but would wear a shirt like this or for now drink coffee from a cup that says "instant human just add coffee"
IT IS FANTASTIC