This product is very solid and well weighted, the rubber grip which is supposed to stop the mount from slipping around on the dash also feels as anti-slip as is technically possible. On flat roads driving sensibly this product does what it says on the box, the problem is if you have to accelerate up a hill, the sat nav (mine is a normal size Garmin live 540) and the mount will still land up in your lap everytime. Within 24hours of owning this product I had reverted back to attaching my sat nav to the windscreen and hoping that nobody steals the windscreen mount which I am again now leaving in the car due to the hassle of detaching/reattaching it. My Nav-Mat is now used as a paper weight/ cup mat on my desk.