Mine recorded fine when I tried it out, I only did 2.5 minutes or so but it didnt turn off at any point upto that and thats when I stopped it.

Button on the top is a bit awkward to press when its mounted in the car as you have to push it so hard it moves the mount about.

Basically as you would expect it feels cheap and I wouldnt bother for a trackday probably when for not much more money you can get a so much easier to use camera with a screen to preview where its pointing etc, but its a great little gimmick and it really is very small and the vidoes are quite good quality.
Great as a spare though