The sketch-processing code seems easy to use and produces very nice results; too bad the app is so poorly packaged. To this user, it screams "not Mac" (goofy un-Mac-like open dialog file chooser, no app menu prefs, and such). I used this app just briefly and was able to crash it very quickly (10.6.1 and 10.5.7).

Especially for a single-purpose app, priced at a hefty $72, this Mac user (and software tester) expects much better implementation and testing. I wasn't able to find another stand-alone photo-to-sketch Mac app; perhaps another developer will give this app - poorly implemented and expensive - some competition.