There are no negatives to Driver Sweeper. Back when I had a 8800GTS 320mb and a 9800GTX+ I did some testing with Driver Sweeper and using it would result in 3d Mark scores several hundred points higher than not using it. It was probably 3d Mark 05 or 06 and as I said in my first post I am sure Nvidia at least has improved their installer package to do a better job uninstalling the old driver when updating. So while I can't say for sure it still helps, it used to and I still use it.