Review on DeLUX Wireless Ergonomic Mouse - Bluetooth, 4000DPI Vertical Mouse with USB Receiver and BT1 + BT2, 6 Buttons, Removable Palm Rest - Laptop Computer and Carpal Tunnel Support (M618PD-Black) by Adam Jacobs

I started returning this item because I'm not used to a fast mouse, call me old fashioned, but I gave it another chance and used it again liked it because my arm doesn't hurt as much after each use. If you have a headache after hours of computer work, I recommend buying this ergonomic mouse, it's comfortable. It may take some getting used to, but after a few days it will feel so comfortable and you'll be glad you bought it...