This game is either overrated or underrated. I have an opinion in between, so you can get ACCURATE INFO.

GAMEPLAY B: I know some of you are going to KILL me for rating the gameplay a little lower then you expected. Here's the thing though, the gameplay would have been A material or even A+ material if it were not for the EXTREMELY CRAPPY level design of this game. Seriously was Sonic Team drunk when they designed these levels! because these level designs are pretty bad. Same problem with Knuckles Chaotix which had poor level designs. To be fair though the game had several innovations. For one there was a time travel mechanic that allowed Sonic to travel to the future, past, and present. It would have been great if you don't have to run full speed for 5 seconds. It seems easy, but because of the poor level designs, means that it's really hard.
Also there's 3D special stages. No not the lame choppy half pipe special stages in Sonic 2, but instead you have fully 3D special stages. They look like something that you would get on a Super Nintendo. 

GRAPHICS A-: Despite the extremely grainy and choppy "mini cartoon" as displayed on the box. The graphics are generally pretty good, the backgrounds are colorful and imaginative.

SOUND B+: I LOVE the japanesse soundtrack of this game. However the american soundtrack is not the best and it can give nightmares to some people. 

ADDICTIVENESS A+: In most games I rate the section high and I did again with this game. The game is exciting and fun and its definitely going to kill some time.

DEPTH D: I was extremely angry when I saw the amount of levels that are in this game, especially when the box said 40 FREAKING LEVELS. Sega was cheap though and they counted the different time periods of each level. Another thing was that this game was on a CD! Shouldn't there be MORE levels.

DIFFICULTY MEDIUM HARD: The poor level design makes this game a bit of a challenge. So if you want a challenging Sonic game. Play Sonic CD!

OVERALL RATING B+
Up coming action packed reviews. Now I will start adding pictures, hints, and cheat codes. In my reviews

Berzerk (Atari 2600)
Mr. Do (Colecovision)
Castlevania (NES)
Streets of Rage (Genesis)
and possibly
Metroid Prime Hunter (Gamecube)
If there is a way to do Gamecube reviews on vizzed please let me know.

Yeah I been waiting this game review from you, and it is good. The game is such a great game.

G@mehe@d: First of all I also LOVE the European/Japanese soundtrack. It is Very well done, especially Tidal Tempest. As for the bad level design, you are right and wrong, Sonic was made to be fast in Green hill not Labyrinth Zone, This game emphasised more of a treasure hunting kind of levels not speed demon levels, Though I do wish that there were more 'Green hills' in this game The formula wasn't bad, well not to bad, but still I get what you mean, Sonic was made for speed but we can have one exception every once in a while. Stardust Speedway was made to go fast, but all the precision jumps required to make it on the fast lane were tedious, and if you fell to a lower level you ended up back tracking anyways. Not to hit you on the head, but I liked the treasure hunting the game had in it, But that's just me.

Anyways, Good Review, And I can't wait to see some more of your fine work!

G@mehe@d : Just a little Heads up, Metriod Prime: Hunters is a DS Game and not a Gamecube game.

Anyways, nice review. I love Sonic CD although the levels are kinda overwhelming to me.

Sonic CD is one of the few enjoyable games for the Sega CD. Personally, I think its one of the best Sonic games of all time. In the top 3, if I made a list. The soundtrack was amazing as well. Its all around good, I don't see many flaws to anything for the game.