I've only recently started using the treadmills at my gym and I'm a bit ambivalent about them. On the one hand, they are handy for those rainy days when Teps, unlike Meerkats, prefer to stay indoors, but I do feel a bit claustrophobic on the damned thing and it can be a bit tedious, although all those Hill Programs and what have you do add some diversity to the experience. I still prefer running round the Common.