The Game is amazing All three stories are in depth and there is a few easy spots in the stages but anyway back to the topic on hand the review this game has a lot to offer like emblems for getting A ranks for every character stage, a central chao garden, and also it has city escape one of the most famous sonic stages ever. I would recommend you to buy it so you can enjoy it but when this is complete and you can play it here definitely do it. The good parts of the game the stages are big enough to offer a lot of game play the graphic and animations are amazing considering the previous game SA1 had bad animation and the graphics were not as good. The Music is very good and fits the stage very well. And also The difficultly really goes up as you go on the game to the point of getting nearly impossible but that is the only thing I don't like about the game. 

iv moved this to discussion since you didnt rally say what was good about it and it fell short of 100 words.
If you want to expand it it can be moved back though.
If you do go for that, you could try disscussing the controls, sound, graphics etc.

thenumberone : Thanks for the info about that