I use my Acer C720 Chromebook on a daily basis as I find Chrome OS more efficient in its use of the CPU than my Toshiba Satellite C660-15R Notebook running Windows 8.1 Professional as Windows 8.1 Professional seems to be a bit of a CPU hog and constantly runs the CPU on 99% or more which makes it a bit slow for daily use. I'm running my Toshiba Notebook in a dual boot configuration with Windows 10 Technical Preview.