"Sonic had a rough transition into-"
shut the fuck up

This game is amazing and one of sonics best
The story is great for a 1998 platformer, with Gammas story being the most notable

Each gameplay style is unique and while I think the game could still be good if only sonic existed, the other styles are cool too

Sonic - The best gameplay style in this game, controls great, almost all of his levels are amazing

Tails - On the easier side, but still fun

Knuckles - His levels don't feel made for him, but he is still very fun to play as especially in his best level, Red Mountain

Amy - fuck amy she sucks

Big - once you learn to play him, hes aight

Gamma - Amazing gameplay, the whole 3d shooting style is amazing and he has an awesome story

The game has amazing music and the main theme Open your Heart is great.
My main issues with this game are only some game styles and the jank

This game can be janky at times, and thats its main issue, however in my playthrough I didn't experience too many glitches so my playthrough was fine. It really depends from playthrough to playthrough

Overall, I'd recommend this game, it is one of Sonic's best and also one of the best Dreamcast games.