I am using Firefox (.png) as that's all I know how to use (and they accept in 300 dpi PNG format).
The printing is apparently high quality BUT done using a laser printer which apparently limits the colour quality in the end -- but I know nothing about these things personally.
The outside border has to be white because the cards can chip, as my pokemon, digimon, and whateverelsemon cards have, and it just looks bad; and judging from the screenshots from the website these cards chip quite easily. But it's unnoticable and totally not a problem on white borders.
The blue outside border will be replaced with plain white to provide a safety zone for cutting - I kept it blue just to show where the actual card would fit.
With no extras (counters, markers, etc) the base cost would be $7.63 plus profit.
$7.86 if a pack of 70 counters are included.
They don't come in a very pretty box, that's the only real problem.