A rightfully deserved 20th anniversary gift!
This is probably the best anniversary game available based on the content it came from.
Truly, Kirby's best games on 1 single disc. Kirby's Dreamland 1, 2, 3, Kirby's Adventure, Kirby's Super Star, and Kirby 64. There is also a special Kirby game on there that uses the images from Kirby Wii Return To Dreamland which was fun. The only strange thing about these games is that they are all Virtual Console ports, like they were ported to the Wii download service, then ported to a disc instead of real emulators.
Very minor issues include the Virtual Console nature of these games which has nothing to do with the content, but rather how Nintendo decided the Wii should handle this game. The other is probably for the same reason, but the controls still cannot be customized.
The good parts of this game disc is that it includes the best Kirby games out, GAMECUBE controller support, classic controller support, a soundtrack disc that is selected music from all the Kirby games (usually 3 per game), a history book, and quickplay instructions that only show the Wiimote for some reason.
Breakdown:
Kirby's Adventure: Great game, a little long for a platformer.
Kirby's Dreamland: black and white gameplay at its best, but very short.
Kirby's Super Star: Without a doubt, the best Kirby game.
Kirby's Dreamland 2: a good, solid Kirby game.
Kirby's Dreamland 3: a pretty good game, not as good as Super Star.
Kirby 64: The ability to combine abilities leaves you with 64 total abilities to battle 7 intense boss battles traveling from planet to planet. The checkerboard minigame is very fun!
I say, get this game, for $60 ($10 a game plus a bonus game), you can't go wrong!