I use this mouse for drafting using Carlson Civil and Microsurvey both of which are CAD programs. I have been experiencing a good bit of lag with my mouse when moving the cursor and scrolling. It happens about once every hour or so and will last for about 5 or 10 seconds then it goes away and the mouse works fine. Also if I have smooth scroll enabled, it affects the speed at which I can pan right after I zoom in the CAD programs.