Not to be mean, but I don't get why anybody asks if the should or should not buy a game. Everybody has a different opinion, so you can almost never get a real analysis on a game, unless yuo go to a game review/critic site. And those usually suck anyway.
Now, to express the main importance of this post, I will make this next sentence bolded, in itallics, and big, for reference.

If you want to buy a game, buy it!

It's easy enough. If you're really interested in it, buy it, for cripes sakes! I mean, just because one person hates a game does'nt mean you'll have the same opinion. If anything, rent it, to see what it's like. It's not like it's anyone elses money, anyway.