I picked one of these up a few months ago from woot, refurb and all. Nary a problem with it. It doesn’t like streaming 1080p very well (might have been a network issue but I upgraded the whole house to gig recently and haven’t tried a 1080p stream since, so ymmv). I think most of the refurbs on these are from people who don’t ‘get’ how they get content. Streaming over a DSL line or anything less than 5MB won’t be a very good experience, and sometimes the browser doesn’t auto-fullscreen like you might expect it should.
If you’ve got a lot of local streams on your network though, it’s a fabulous little box. Absolutely silent and just works.
I bought it for Slingplayer. Figured Sling would eventually release an AppleTV app, but they’re so slow I doubt it would’ve been released before the baseball season. This will be great for watching games away from home.