I am going to agree with everyone here. I ride the coasters, but don't build any. One of these days, I am going to teach myself how to build one.
If you wan't to build coasters and ride them without learning the Complex No Limits program, go with Rollercoaster Tycoon 3. Also, No Limits only allows one coaster at a time, as opposed to building a park. On the other hand, I have problems with RT3 running on my computer when I have to many rides, lights, ect. I even bought a new Video Card and it is still slow. No Limits worked fine with my old video card.