Awesome! At this point, we've mostly just watched TV shows through it, like The Munsters, Hanna Montana, and The IT Crowd. There have been times when I thought that it looked a little bit blocky, but not too bad. It's great for just picking something to watch on the fly, especially since we don't have cable TV. The stream always seems to run smooth, and the system is set up for pretty simple navigation and controlling with the PS3 controller.
Of course, it also helps to have your "Instant Watch" Queue at Netflix set up in order of which movies/shows you're wanting to watch so it's easier to get to them. Fortunately, if you're watching a series of shows, the "Watched Recently" tab is awesome for jumping to a series that would otherwise be in the middle of your selections to cycle through.