Maybe i'm expecting too much, but I have now used the dvr-027, FL500HD, Garmin dash cam 20, and i just got the Mio Mivue 568 today.
Garmin Dashcam 20 records at 9 mbits
Mivue 568 records at 13mbits
So far none of them have the clean video quality. All of them are very noisy, grainy, flat...