So I have a router downstairs on the complete opposite side of my house from my PC. My internet is decently strong downstairs, but upstairs where my computer is, it is horrible.(I am unable to move my router) I bought a netgear wifi extender that seemed to work for a few months but then the signal strength decreased a noticeable amount. I recently came across Google wifi, and I have an important question before I buy it. My question is if it is a standalone wifi network, or if it acts as a wifi extender for my other router?