Also notable is that it's probably the first movie I've seen which actually does need Blu-Ray to come across very well, because of all the little fiddly details which would have been lost on DVD. The main character has a fairly interesting form of synaesthesia, and the way it's conveyed is very well-done. Sure, it'd have been visible on DVD, but the details would have gone away (watching the "making of" segments, which are encoded at DVD quality, confirms this - eye-strain city!).
(Though I find it way too obnoxious that even on a Blu-Ray disc, where the ONLY format is 16:9, there's STILL crap like the extras being 16:9 letterboxed into a 4:3 frame! You'd think that with this format, the content producers would finally NOT DO STUPID CRAP LIKE THAT. Oh well.)
Anyway. I really love seeing Will Ferrell in something that isn't just a boring straight-up comedy. He's a pretty good actor when he's not playing Will Ferrell! I hope to see him in many more good things.