Ya, I just went there, and honestly I don't like it.  If you just do rails, well then I guess its fine cause they got a ton of rails set up, many different ones.  But, its not that much better than some of the other places for rails, and the jumps SUCK!  OMG, so I wanted to go on the big ones but I didn't have time to check it out, so I just went on the medium ones.  The first jump you can't clear, and the second one if iffy.  Then comes the third, and if you barely clear the second, you will be fine.  But if you keep your speed up, you will bottom out.  Plus, copper is so crowded, so just go to one of the other places.