This game features a lot of stuff from the Marvel universe. And that's what I like about it. Despite the player building the correct team in this game, it is the individual character that makes this game good. Each playable character has their own specific powers and abilities. Unlike in X-men Legends II (wherein I always had Iceman in my team so that I can get through some puzzles), any team will allow you to finish the game.
The lenght of the game itself is ok, not too long, not too short. There are also comic missions which will allow the player to use a specific character and play (sort of) a comic book episode of that character. It also has tons of unlockables (comic book covers, extra players, etc.) which will keep you playing for more hours. Some of the comic missions actually got me interested in reading the profiles of some characters (Ronin, Captain Marvel, etc.).
One thing I like in the PSP version is the additional playable characters (Ronin, Captain Marvel, Hawkeye, etc.). In my opinion, Ronin has the best power of them all. After unlocking her final super power (echo effect), she can use that to imitate Deadpool's spinning blades and she does not spend any energy on it. So you continue to spin as long as you hold that assigned button, perfect for those tough bosses (Ulik, etc.)
Camera is good for me as well. I actually think that was just perfect as I do not like action/adventure games (in 3rd person) wherein you have to manually move the camera (with the right analog stick) as you move your character.