It was the only one of its kind ever build, so it was not really a successful ride. I agree that it was quite impressive looking.
I think that we already have a lot of very large flatrides in the game. I would be thankful for a bunch of rides that would fit in smaller areas of the park.
But we can never have enough flats, coasters and scenery...so bring it on![praise]
Not the only one, there was another at Six Flags (only the one other). However, it didn't last as long as Slammer! You can find some info on it via Google. Catapult was its name.
Though with all of Slammers down time and the amount of time it took to load and unload, they probably lasted as long as each other [haha]
However, yeah, I would also like to see it in PC! It's an odd looking thing but very cool looking, even if not that popular with the crowds.