Personally i'm having trouble with the lack of excel/formatting and printing options. I'm trying to build a cube with a friend but there is no easy way to quickly share my library or portions of my library (except as a deck).
While having the basic outpost of QT cardname is ok if you are printing up a quick list, it seems like a csv or excel or odf would work so much better and be able to include tons more data.
Also one thing thats a bit odd, from an SEO standpoint i've noticed if you search for 'deckbox.org export' in google it brings up EVERY SINGLE page generated as the 'print-friendly' page. Kind of an odd result.