Okay.. I don't need convincing on the benefits of the Extreme over the Express. I have an Extreme and love it. BUT, this is for my parents who only use the internet to send emails and surf the web on their desktop and who minimally use their iphones and a cheap lenovo tablet every once in a while (I don't think their tablet has AC capability). I doubt they care about internet speed. I just want to know if the Express can cover a large area of a two story house. That's all. I would most appreciate comments from people with that experience. I know I can go all the way down to the end of my block and still get a signal from my Extreme, but I just want to know if the Express is "good enough" for my parents.