I've done Ihu 3 times in 2 visits, and while I love the thrill and speed, ProSlide and the others need to come up with a coating for the slides to eliminate the seams. Every time my wife looks at my back and asks if I was whipped, and it isn't a great feeling during the slide. It does sting a bit after, and goes away quickly, but I'm always like "Owww, oww, oww, oww!" going down and feeling each seam along the way. Gotta be a way to overlay a clear coat that lasts to get rid of the painful seams at faster speeds.