there are plenty of Sony Action cam reviews on the interweb... i was looking into how it compares to my Contour HD... also contemplating adding GoPro 3 to supplement the Contour. The reason is that GP has an ext mic jack... that will let me run a mic to the trunk area to capture only the exhaust - without all the wind noise.

Here is a review from Gizmodo:
http://gizmodo.com/5953000/sony-acti...me-as-we-hoped