The positive reviews got me to order this pump. When I saw the mount I almost sent it back. Then I looked at the picture. The mount causes the pump to sit next to the frame and I wanted the pump on the frame. It seemed dumb to make the frame wider by the width of the pump. Now I see that it is designed to mount under your bottle holder so the pump is right next to and covered a bit by the roundness of the bottle. Perfect for ladies bikes that do not have many places to mount. Turns out it is a great design. Seems to work as well as everyone says.