The pay version includes a free version.
You just have an 8-second countdown whenever you want to stream or download and you get damn reminders to activate everywhere you go. I'm tempted to send the guy $15 because I've gotten at least that much pleasure out of this app. But I don't like some of the restrictions in the contract terms: Only good on current PPC. Only good for one year. Not friendly...
Also, like Nautica says, not that much changed from last free version. For example, hardly any new channels.