I started using this mouse as soon as I got it. I use the computer 8-11 hours a day and this has caused some stress on my wrist. I switched to this mouse and it changed the world! I know it will take some time to get used to at first. The way it moves will be different since it's a vertical mouse, not a flat horizontal one. Once you learn how to use it, you won't want to go back to the usual!