I have not used it with the programs you reference, but I have tried Google Sketchup V7/V8 and ViaCAD V7. My comment is ... Ugh. It takes more time that I want to give it to get precise positioning. I found myself "rolling" my finger over left/right trying to get the object I was working on to "hit" the right position. If someone makes a stylus that would work with the touchpad, it might work better.