Navigation is a breeze, both in usability and in performance. Your options are laid out in a scrollable, horizontal bar at the bottom giving you access to Services, Videos, Music, Photos, Files, and Setup.
Alternately, you can load up content stored on the Hub's 1TB hard drive and view it on any PC in your home network, and using the Web-based Twonky front-end, you can manage files on your media box and perform a handful of other tasks.
One thing we have to point out here is the po-dunk version of Netflix. As implemented, this would have been awesome a year ago, but the inability to search for titles is inexcusable.