After some real-PITA problems with SD card compatibility, I've finally gotten some test footage up. This is unedited, right from the camera.

So far I'm moderately happy. This is a review for the Dashcam 20, the one with GPS.

The Good:

Daytime video quality is very good, especially in 1080p.

The GPS locks very quickly (you'd hope so, it's a Garmin!)

Motion/incident detection appears to work as designed



The No-So-Great:

The provided Software is Windows only (I'm more of a Mac guy, but have both), and is very limited. You cannot export video files, only still images. You cannot export video with the embedded GPS or Accelerometer data. This is very disappointing.

Very picky about SD cards. Does not accept a Sandisk SDHC 32GB, Class 10. From everything in support I've read this card SHOULD be supported.

Cannot use SD card readers or other methods to download footage. You MUST download directly from USB, in-camera. This is tedious and much slower than a card reader, but card readers seem to corrupt the Dashcam 20's proprietary formatting on the card.