I finally decided to give this a watch, after putting it off for so long.
I kind enjoyed it. Mainly because I love dead-pan humor sometimes (Hata from SYD comes to mind), and that kind of thing seemed to fit Yu well, IMO. It's mainly just preference. For a game -> anime adaptation though, I think I enjoyed it way more than I expected it to... though my expectations were kind of low to begin with. I mean, I'd definitely never choose it over the game, but it's definitely good enough to pass the time with, IMO.
There's one thing I definitely can't complain about, and it's the animation / art direction. I was definitely happy that they stuck with it, and it made me feel a lot better after Im@s' crappy game -> anime animation/art direction change.
Anywho, I have the first DVD set pre-ordered. I liked it enough to buy it.