As soon as the games start to get good, the movies get bad.
The voice acting was good, but I think that some people either just weren't trying or they weren't getting paid enough, like guy who played as Eddie Brock, for example. Sometimes it looked like the character model was acting better than him. The story, (which was pretty much the only thing you could do) was satisfyingly long. The difficulty seemed way too much for a casual gamer! You'll yell in frustration, you'll want to throw the controller down to the ground and cry for hours and hours, yelling "Why?! WHY GOD WHY?!!! I know I did.
To sum it all up, this game is worth the money, one of the most underrated games in this site. I give Spider Man 3 the videogame a 9 out of 10. (If only the movie was this good.) :D