when using side wheel for copy/paste from excel toggling to another program and back, sometimes COPY selects a whole giant area instead of one single cell and I have to revert back to manually typing CTRL+C after selecting the cell. It happens about 5% of the time. I have very repetitive tasks due to outdated documents/software I am using for my job, so this mouse is the only relief from copy/paste clicks that happen over 500 times a day.