Actually finished it a few months ago for the Wii, as a result of a very forceful (D:) recommendation from lancer_c.
As many posts before me have stated, the game is epic beyond comprehension. Unique and enjoyably fun to play game mechanics coupled with incredible visuals gives you everything that Okami is. However, since I've played it on the Wii, I can't imagine how it would be to control the celestial brush with a ps2 analog stick.
Combat and other tasks seem to flow much better on the Wii, so Oracle is at no loss in that department. On a side note, I love the different costumes upon game completion :>
Only wish there would be a sequel...
;_;