I'm really digging the Roku 3. It's almost like having cable tv in the truck. The hardest part is flipping through all the channels trying to decide what to watch.
It came with a free trial of Amazon Prime so at the moment I'm watching Justified on that. So far it seems like a pretty good show.
I've seen very little buffering, and that just on a couple of channels, probably slow on their server side.
Lots and lots of free stuff to watch and of course plenty of paid subscriptions and pay per view stuff too. Except for my Netflix subscription and an occasional movie rental, and possibly keeping the Amazon Prime, I can't see paying for anything with so much free stuff to watch.