i used to play megaman back in the day and always thought the games were fun but never amazing. (this game) megaman is even less amazing if you own any current generation console.
if you want to relive the "old days", this is for you. it's all the same old thing. this game has megaman 1-8 and two previously unavailable arcade games. you have to unlock the 'special' arcade games. i couldn't care less about unlocking special content on a game like this. this game was really released more as a hype boost for a different megaman title which came out shortly after this did on ps2.
bottom line: if you like megaman, you will like this. if you hated it... you know what i'm going to say. i'm in the middle, but i wouldn't suggest this game to anyone other than hardcore megaman fans.