This is an extreamly addictive game.  Both  my son (10) and I want to play and we are constantly trying to get the mouse from the other during game play.  We have various sim city and sim train games but none are as fun to play as this one.  I think this is for two reasons.  First, the game is not one where you get frustrated because you go bankrupt every time you try to play.  Second, ammusment parks are fun to go to and fun to build on a PC.  You can build the park of your dreams!  Additionally, the program is easy to learn, seems to be absolutely bug free and the graphics are great.  It lets you change the landscape and build various tunnels and other things that you wish they would have on real parks (if they weren't so darn cost concious).  If you like sim games or just want to try one to see if you like them, this is the one to get.  Happy building!