It works well. I just don't really know what I'm doing with it yet. I've been trying to get a feel for how to do stuff in sandbox mode. I attempted to make a mountain with waterfalls, but failed miserably. And I have a volcano with fire coming out of the top and extra fire randomly in front of it (oops) that I can't figure out how to remove.

Oh well, I'll figure it out.
After a few hours of just randomly slapping rides, etc. down, it has become painfully obvious how genius the hub and spoke park layout is! Once I've figured out the other stuff, I'll start again with a better layout.
EDIT: After playing with this for awhile, I'm even MORE impressed with the screenshots of your park.