I have had this now for about 5 days and these devices have done exactly what they were advertised to do. My home is about 3700 SF and two stories. My modem is not centrally located in the house. In essence, I have one puck attached to the modem at one end of the house upstairs, one centrally located on the main floor and the third on the main floor as well and on the complete opposite end of the where the modem and first puck are located. Setup was a snap with the app. I actually tried to set the third puck at the extreme opposite end of the house and the app prompted me to move closer to puck 1. Only needed to move it about 8 feet closer and I was set. Coverage is phenomenal. My daughter can now roam the house without dropping our wifi signal. This setup is great and a great value. Upload and download speeds tested at 50Mbps and 56Mbps, respectively. I'm told this is not a very customizable system but I'm not one to delve in to the innards of this kind of equipment anyway.