A great collection for any Kirby fan.
First off, this collection contains 6 classic games. Kirby's Dreamland 1-3, Kirby's Adventure, Kirby Superstar, and Kirby 64 Crystal Shards which can all be played with the Wiimote held sideways, classic or GC controller. I will admit that I would've liked to have seen the GB games added to this as well as the GB port of Adventure was a much better version of the game. But the games look great though it would've been nice to see them reformatted for widescreen or perhaps the GB games with the Super Gameboy color palette but it was probably not possible.
Along with the collection of old games you get a timeline, a history book and a CD of Kirby music. Sadly unlike the CD that came with Skyward Sword, this is just the in game music, not a symphonic remix. Also contained on this is 3 episodes of Kirby's anime "Right Back at Ya." Though it is one of the better Nintendo based cartoons (better than Mario's or Link's and more true to it's source material), I would've gladly dropped these for a few more games.
Also included on the disc are a series of new challenges using the "Return to Dreamland" graphics. Magalor after apologizing for turning evil and trying to kill you and all, brings you to his ship to engage in some very addictive time trials though I get the impression had the Wii supported this, these would've been DLC for "Return to Dreamland" still they were some of the most fun I had with this and highly addictive especially if you're after that gold medal.
With this generation dealing out a lot of "collections" and myself owning 3 HD PS3 collections, Kirby's Dream Collection is one of the nicest compilations I've seen and had a lot of care put into this package and if you're a fan at $40 it's not a bad thing to have for your collection.