When Oni first came out for the PC, I was expecting it to be great. Luckily, I installed the demo first before slapping down $40. Oni had plenty of potential, but ends up falling short. Sadly, the same holds true with the PS2 version. Combat is fun, but it is often hindered by the awkward controls. It took me a good 2 hours to finally get comfortable to moving my character around easily.
To make matters worse, the environments are amazingly dull. I've personally designed better looking levels on my PC than this. The textures are also really plain and the enemy AI is sloppy.