In a nutshell, the interface is a clean, slick, and very Hulu-like in nature. You get pretty awesome video quality, but it's solely HBO content that you get here. No Hulu shenanigans or outbound linkeroos. However, if you're a big fan of the HBO network, you'll have 600 hours of TV watching at your fingertips and dozens of movies (for the time being) available at your convenience.
We're still adjusting ourselves to this new digital media climate, but all in all, we at Unplggd feel that loosening our ties to standard TV watching can be a good thing. Especially with new products like Boxee that try to make the media experience a social one and Hulu making desktop applications to mainstream the home theater PC (HTPC) - something that was once considered solely an enthusiasts' weekend project, we can truly see a brighter future for on-demand systems that are both social and interactive in nature.
Bring it on, media networks. We're always thirsty for more.