Make sure you ,make a tether, just in case the suction comes loose. I don't have confidence in those suction devices. See if it has time laps in the camera (They may also call it stop action) With that you can make it look like your hauling ass.
I use a lanyard for my GPS every time ($1 Store). Half way through a day ride, it came off, riding along the Hwy. It saved it! Pulled over, remounted, and continued.