I would only use a GoPro branded suction cup mount. ALSO... I always carry some glass cleaner and a micro fiber towel. I make sure to clean off the car AND the suction cup before mounting it on the car. I've never had an issue with the mount coming off the car.
In all honesty... WHY spend $400 plus on your GoPro and not afford to spend $40 on your mount?
Btw... over here the GoPro mounts sell for 60 euros.
Everything costs more over here!
