I have several keyboards at my disposal and the one I am most comfortable with and the one I am writing this review with right now is the Necessities one! It is highly responsive and does not appear to have any lag time. My computer is quite an expensive custom one with Windows 10 and this keyboard couldn't be better with it especially at this price. However the mouse is nothing special but it does the job quite well and again for the price it can't be beaten. It is good to be wire free when operating the mouse. All told a real bargain especially the keyboard. I have an expensive fancy keyboard by contrast and it is nowhere near as easy to use. Also the Windows function keys are a real bonus.