From 0 to 700 in a split second !
There are three environments in the game, island, coast and bay. The first one is the most instantly rewarding, with incredibly fast cars that handle better than a dream. Here everything is about impossible (literally) speed, jumps, stunts, amazingly complicated tracks, colorful techno-festive scenarios. The challenge is to make it fast, of course, or to actually make it using the least possible number of respawns (that's called platform, for a reason). Bay is a slightly different scenario, with SUV-style cars pretty difficult to control and more technical tracks. Island is a wonderful mediterranean-style environment in which you got a sporster car, supposedly more realistic driving and anyway completely different handling from the other two, the most technical, for sure.
TMS is very easy to learn but takes time to master, I guess. There is a huge number of challenges, organized in campaigns, and for each one you receive a rating bronze/silver/gold. Bronze is normally extremely easy to achieve (I normally get it the first time and my driving sucks). Silver takes some time but it's still doable. Gold is really hard, as it 's supposed to be.
Replay value is very high, due to the number of official and community campaigns, not to mention the ones you can cook up yourself.
There is an important part of the game, the editing of tracks, campaigns and cars that can also keep you busy for the longest time, and a community that's very much alive to exchange TMS stuff.
If you are into racing games, play this game. If you're not, play it all the same. You'll have fun !!!