Care to tell a little more? I've seen the commercial too and keep saying to myself "wtf..."
Basically, you don't buy minutes, you buy money for your account. Then when you make a call, you are charged $.25/min for the first 10 minutes of a day, and then $.10/min the rest of the day. It runs on the Sprint PCS network, so you get nationwide coverage, with long distance and everything free. Granted, it is still alot more expensive than a regular plan, considering most other prepaid services cost you like up to $.33/minutes, its pretty sweet.