It is rather difficult to write a review for a game that has been out for years – almost everything there is to say has been said elsewhere. However I do not think that this one little detail can be stressed enough.
The massive amount of enjoyment you can get from playing this game. You can finally live your dream of building incredible coasters that are only limited by your imagination; then you can ride your creations all night, like that girl I had over last Thu–never mind.
If you like rollercoasters, and chances are you do, then you will spend many, many hours on this game, making the perfect theme park and creating incredible coasters.