I'm reviewing the game too for another site. Personally I loved the game from start to finish. I wouldn't say it's as huge a leap from the first game to the second (Going from forests and mountains to a sprawling GTA-style cityscape), but more of a continuation of Jak 2. Graphically it's not much different to its' predecessor, but as per usual the voice acting is supurb (Daxter
always cracks me up!). More weapons, vehicles and abilities are just the icing on a really sweet sequel.
Some of the levels are really frustrating though, as a game clearly aimed at the younger audience, it's hard to figure out why it's so randomly difficult in places.