[quote name='TooPoor']Got this for $20.xx on amazon during BF, in local co-op it is TOTALLY unplayable (which is why I got it for).[/QUOTE]
Why? We had no problems with it. It's annoying sometimes because there's no split screens, so it's a little like old Lego games in co-op, but it's in no ways game breaking.
It's worth playing at about $10-20 if you're into real-time dungeon crawlers. I used Katarina, who most people don't like, but she's awesome on bosses. Critting like 4k+ per shot at end game.
Skills are mostly useless though, so you'll be using the same 2-3 skills the entire game.
Yes, it's very linear. I don't know how you can even get lost for more than a few minutes, even without paths displayed.