About the Garmin photos, they are not good in indoors or with low light, otherwise I am satisfied with the result.
About the speed, I do not take at that rate. However, it seems a SD card problem, instead of the camera. I have a high speed and card and I have not had any problem.
The 2 meter cable was to keep both cameras an cell phone with energy for long time.
Finally, the main purpose of this entry was not talking about the Garmin camera, but about a bike with 360 photos.