Shipped on Tuesday, received in southern CA Friday. I got the ACG 50s. Seems to work just fine. Press the button to turn it on, it automatically starts recording video. I don't know how to turn it on without starting a recording. Press & hold the button for a couple of seconds to stop the recording and put it in standby mode. From standby, a single tap captures a snapshot, a long press starts a video recording, and a really long press shuts it off. Video quality seems OK, comparable to a phone.