Just picked it up off Ebay($38.00 to my door). Didnt think it was my kind of game when it first came out, but after reading alot about it I got kind of interested. Read alot of "should have been game of the year" comments and how great it was once you got used to it. My problem is I get bored real easily if something is frustrating. Is this game so hard that it gets to be no fun repeatedly attempting to beat the same level, or is it just challenging enough to be great? What are some general opinions?