I purchased the Go Pro Motor sports package that included this suction cup. The first day I used the suction cup, I drove 40 miles on the freeway with it staying on just fine. On the way back, it held fine until we reached the top speed of the trip. My Go Pro was ripped of my car at 75 miles per hour and thrown onto I80. I eventually found my camera and the pieces while hiking up and down Parleys. Sweet idea and great for slow, good weather condition days. Bottom line: Just remember you are strapping a $300 investment to something.