For the average home user that does emails and surfs the web, turning off QoS and all the extra options within it is recommended. QoS is mainly for having multiple devices online that need alot of bandwidth, like Gaming and game consoles and helps them and other devices get a fair share of bandwidth by prioritizing the data coming and going to each device while they are online at the same time, ensuring that all devices get a fair share of Internet usage with out one device hogging it all up.