I've seen them before, but the price seems exceptionally prohibitive once you get into serious long term usage... I would imagine i'd use enough hours in a given week that before long, I would have been better off just buying a machine. But i'll admit, i'm mainly doing the math out in m head.

Also, the page has broken links when you go choose a plan, so it's hard to get more info.

But this is solid advice for someone who wouldn't need to use the system for many hours in a week.