I just bought one of these after reading reviews on more than one tech site. Even this off brand dash cam has many knock offs, you can try to find the real thing on Ebay or Amazon, but buying it from spytech is the best bet.
http://www.spytecinc.com/g1w-1080p-hd-c ... amera.htmlFor recording your trip, any cam will be limited by memory, true dash cams like the one I bought or the very nice expensive ones from Garmin do a loop, breaking the recorded video into segments, when the card is full, they overwrite the earlier files. If you wanted to save the best bits of a drive, you would need to be connected to another memory source like a lap top, tablet or phone. Then download the files before they were over-written.