I currently live in a 3 storey home and I am constantly challenged by my WiFi connection when I am up on the top floor of the house or outside around my house. I currently have my router setup in my home office in the basement which I get may not be optimal, however it is where I work each day.
I am definitely going to look into purchasing one of these little devices (or 3 of them) soon. Nothing like sitting out back on the deck and a beautifully sunny day getting all your work done using a great WiFi connection.
Check it out eero.