I really like the mount the Mapillary will send you for free.
The advantages are,
It stays securely stuck to the inside of your windshield, tight enough so pulling off and putting on the camera in a hurry to take phone calls doesn't
upset the mount.
Being inside the vehicle means no bugs or rain drops on the lens. You also have access to the camera to turn off, or reset or what have you. Being inside means no effects from wind when driving highway speed.
I really like the price.
I run two now, one straight ahead and the other aimed off to t he left.
Having two cameras in my windshield does limit my visabilty some.
I'm still experimenting.