I wanted something to mount my GPS unit on that did not slide around nor require permanently attaching anything to the windshield or dash. This is it; this thing stays put. My Garmin GPS suction cup immediately gripped it well with no issues.I ended up buying a new car with a built-in navigation system, but was able to put this to good use still as a holder for my iPass Tollway system unit. With newer cars not having much free upper middle windshield space due to built-in cameras and other things to affixed to the windshield, using this instead of trying to velcro the iPass unit to the windshield is a good solution. You're best off not having anything portable in sight in your car to help deter theft. This is very helpful with that.