Summary: Sonic Gems Collection will be worth buying for Sonic CD alone, if you haven't played this game before then you simply have to buy this collection just to play this gem (no pun intended). The other games in this set are a mixed bag really, Sonic The Fighters is ok and Sonic R is good for afew laughs.
Summary: Doesn't Sonic Boom fade into You Can Do Anything? (I might have the song wrong....) Speaking of which, is it true that Toot Toot Sonic Warrior is very close to You Can Do Anything? Anyways, now that my lack of knowledge has embarassed me, I don't think Gems will suck.
Summary: After quite a wait for this game it has been worth it. Its alot easier to unlock the games and extras as well as on the mega collection you have to play the game over 50 times each or something. Sonic CD is wicked and so is Sonic Fighters! The original gamegear ones bring back some memories as well.