Well, I've purchased this great app at version 1.6 and have been constantly using it without problems up to (and including) version 1.72.
Since upgrading to Snow Leopard last week, though, I was stuck with the new 2.0 alpha, which unfortunately is far from stable. All I'm complaining about so far is the weird network error that keeps popping up on my PS3 when watching a movie, but that alone is enough to render the experience dreadful. I've already submitted a support request on their site and am waiting for a reply. Hope they fix it soon (but I wouldn't hold too much hope, considering their update frequency - or better, lack of).