I did tonight, to watch the finale of the 3-part "Ravin's Father Destroys the World" arc. It's a NEAT box. Makes my ReplayTV 4160 few slow and dowdy. (Pity the MOXI box doesnt have the automatic commerical skip.)
Right now I'm watching The Batman in HDTV, which is a trick that very VERY few commerical PVR users have enjoyed so far.