@Kona
What is the diztronic matte case like for feel? Is it a hard rubber or soft rubber like the tough case mate silicone part?
Feels great in the hand - like the back of a HTC Desire. Its more hard than soft, but still very flexible - just like a TPU case but with a nice matte finish on the back .
Does it show fingerprints and greasy marks easily and if it does, is it easy enough to clean/wipe off?
Not easily - and quite easy to rub off iirc.
And just to clarify, you found it be very good for the power/lock and volume buttons? Good feedback and not too easy to press but not too hard to press?
Yep only the volume buttons are covered - and they have good enough feed back. Cut outs are very nicely done in both shape and final-finish.