As a delivery platform, it seems to work pretty well. However, as a television service, the content just isn't there. There's pretty much zilch. This might not be true in the US (being in Canada), but until I can watch actual television channels or content, I'm really not very interested.
When I tried it, there was only one channel with actual content, showing older anime series. That's fun, but... that's just ONE decent channel for the entire service in Canada.
EDIT: Also, the tech might rock, but their interface is horrible. Slow, confusing, and no option to get something akin to a standard windows application interface.