Definately brings back some great memories of one of the greatest series of all time.
One of the best things about this game is that you can save the game instead of keeping a paper filled with colored dots on a grid. There is still the option to do that if you wish, but saving is nice.
Different things are unlocked as well as you beat each game, including two previously unreleased games. This is just a little extra bit that was thrown in for any fans of the series.
Going back and playing these again really showed me how hard some of the old games really were. Almost every Dr. Wily stage took some time to go through again, and the music has been playing in my head for days now.
This game is definately worth the money and worth hours of playtime ahead.