Rough edges aside, Badman is recommended. It's notable for not being just another dungeon- or trap-making game like other villain-centric games that would probably be better anyway. It's a collection of arcade sensibilities mixed with imaginative design you don't see too often anymore, outside of indie developer circles. For that reason, it's probably better that NIS decided to go download-only with the game, as the combination of simple looks and a steep learning curve probably wouldn't earn a lot of attention at retail.
At any rate, it's never bad to know for yourself what you're getting into: grab the demo (available on the PlayStation Store along with the full game), spend some quality time with it, and then see if you want to tackle the full game head-on -- frustrations and all.