Since then we've had no issues in a fairly large 6 bedroom 3 story house. It depends very much on the construction of your house and interference of other near

Since then we've had no issues in a fairly large 6 bedroom 3 story house. It depends very much on the construction of your house and interference of other nearby APs. We have an access point with a six-element beamforming antenna array (2.4GHz and 5GHz, Airport Extreme). WiFi in a room next to the AP is still reasonably ok. But once there are two walls between the AP and a device, the signal is basically gone. We now use Powerline Ethernet and get excellent transfer rates around the house. (Of course, performance depends on the wiring, etc.)