I was a little concerned that the black "filling" would not be even against the white foreground, but it's actually perfect! The mug has a very thick glossy coating on it that makes it shiny and new looking, even after dozens of trips through the dishwasher. This coating must also work as a kind of protector, because the mug has yet to chip anywhere.
About the print:
Another perfect print job by Zazzle. I have had to scrub this mug with steel wool, right over the design, to be get some baked-on oatmeal off it, but it doesn't even touch the printing. They have clearly coated the mug very well because I don't think I could get the image off if I tried - it's well protected. I'll have no worries about giving these as gifts - they will definitely last.