If I'm in the same room as the Google Wifi, it works well. I live in a 2 bedroom apartment and if you are in one of the bedrooms, with the door closed, it doesn't work very well at all. I was getting better speed from my Fios gateway.
If you want to "forget" about WiFi signal strength....
Adding these around your house will make worrying abou WiFi signal a thing of the past. With repeaters, different named networks, etc, this mesh technology makes it completly seemless. Literally never even think about it any more.