Wheelman doesn't do a very good job of keeping the player hooked. All the best aspects of the game – mainly the car combat – can be experienced early on and they tend to get old after a while. In terms of missions too, the best of them play out early on in the game and they only get more frustrating as you progress. And you just can't have a broken vehicle mechanic in a game so heavily focused on driving, and this is ultimately the game's biggest drawback.
Still, Wheelman isn't a bad game. Though heavily flawed, some might enjoy playing through the story mode and the many side missions. But the negatives far outweigh the positive, so think long and hard before you put money down for this game. Or just don't.