Now TV has 2 major problems (at least in terms of signal quality; this is disregarding the terrible interface and bad channel selection): shitty signal, and overcompression. You'd think with 6 mbps they could offer better quality than sub-VCD MPEG-2 compression. But they can't/won't.
The 6 mbps is better used for downloading programs off the internet. You'll get high quality MPEG-4 AVC compression, in full HDTV resolutions. And you can get all the latest shows, not 2 year old programs. And the commercials are cut out.