I have been lucky enough to get this game before its release, i have played it through its various Beta stages and all i have to say is its absolutely great. It is by far the best racing game i have ever played.
It has an extremely stable physics system, and the ramps boosts and flying through the air all feel reasonably realistic and extremely fun!!!
At last Track Mania have combined all 7 of there environments together in one game, they are all reworked and have great graphics, the stadium environment has double the blocks, and you can change the time of day and do many other ambiance and lighting effects.
The game play is still has the same classic feeling like the other and nothing has been ruined in this game they've just made everything better!
The amazing tools for creating custom content, like level builders, car customization, in fact there are over 1000 blocks to create levels with, and all created levels can be played on single player or online and just makes the game have an unlimited life span! Currently there are over 100,000 custom tracks made by players available on the track mania x-change websites, and it grows everyday.
All in all buy this, you will not be disappointed!