Not as bad as many people say it is.
Yeah, the level desgin isn't that great and significantly grabs the game down, however the story, characters and to a less extent combat carry the game.

It's nice to a full fleshed adult cast well be adults, tacking dark subject matter instead of seeing another uninspired teen power fantasy story with the power of friends speeches.

A charmingly fun, but flawed game.
Pick it up when it goes on sale alongside the DLCs.