Great game - just make sure you have relatively recent hardware.
User Rating: 8.7 | RollerCoaster Tycoon 3 PC
The game itself is fantastic. I love being able to ride my roller coasters and see more expressions from teh peeps. And the sandbox mode is great for testing roller coaster designs without having to worry about money. Playing with the fireworks is fun too. If you took the time, you could set up whole scenes that mimic some of the Disney presentations. My biggest issue is performance. On my P4 1.7Ghz with 1Gb RAM and a GeForce FX 5200 Ultra, the display is jerky. I experience delays when creating roller coasters (click a construction button, wait 20 seconds) that I don't think I should with this hardware. Especially since I'm running at 800x600 with the detail at the recommeneded level of medium. I hope Atari/Frontier can fix this soon.
