The completion time needed for this game is definitely not 6-8 hours, and 20-25 hours is more acceptable.
This game is frustrating at times, so 5/10 for difficulty is appropriate.
EDIT: At the moment I am at around 75% completion of the game and it took me over 15 hrs already.
EDIT 2: Finished the game last night. Took me about 30 hrs. Time Trials are really annoying as I usually had to play some of them twice or more to complete. And some of them take 20 min or so to finish.
Last edited by JieXY; 09-20-2010 at 06:47 PM.