I had the Acer C720, but gave it to my mother and upgraded to the Acer C720p Touchscreen version. One of the best features I like about this Chromebook is that it is basically just a web browser and requires no virus protection. I have been using this computer for well over a year and never had a virus. Even if I got a virus I can quickly reboot back to day one and its back to normal. My main reason for using this computer is because it offers unbelievable battery life. I can browse the web and stream video all day on a single charge. While browsing through the web I can have multiple windows open and never experience any lag. The touchscreen response is pretty accurate when I click on small icons, but I find myself having to click multiple times. There is a slight stutter/lag when swiping side to side, but its not a major inconvenience. The only downside to this computer is that the screen doesn't have the best viewing angles, but it is more than adequate.