Eh.....there are way too many cheap deaths in this game. It's decent as a platformer but overall it didn't grab me. Too much repetitive missions does make it boring after a while. It does have character though, and the story is very well-written and developed, and the graphics are nice and clean. One flaw of the story is that it immediately starts off from where Jak 2 leaves off and then pulls from it and the first one through the rest of the game, so if you haven't played it the story does leave you wondering what's going on. It should have had more back-story to it.
I liked the little things like being able to smash into people for them to shoot back in the wasteland town, or stealing cars in haven city and then wrecking them. :)