there is one in a park not far from me, tried it once or twice, everything needs a fair bit of wd40 and makes hell of a noise, quite embarrassing really! tried the cross trainer type thing, ab cruncher shoulder wheel and waist twist platform which were all fab, had a rowing machine type one too but that was far too odd for my liking, once you get over the rigid metal strangeness and huge noise in my case! was great;-)