Has only tried to playback the MTS files on a PS3? I have a Canon HF100. I'll either store the MTS files on the PS3 hard drive or play them off a SD card (via USB port). It plays back as smooth as from the camera from a card, but adds a 1/2 second freeze frame between clips if removed from the AVCHD structure and stored on the PS3 (you get use to it after the a while). Curious if the GH1 files play the same.