I have the Tread, and I'm on the verge of cancelling my subscription. The $40 would be worth it if I was into the classes, but I tried them for a while and switched back to listening to podcasts while I run.

It's disappointing to have such nice hardware that's so limited--can't watch youtube or listen to music directly on the device, no built in interval training, no way to pause a run... Now that I think about it, it's one of the least-capable treadmills I've ever owned.