Yes, once set up you can just give the whole home discs the same SSID/pw as your router wifi, that way you don't need to reconfigure all your devices. The mesh system is designed to replace the function of the Wireless AP in your router.
Just be sure to disable the WiFi on the router once the mesh network is up and configured. You don't want to cause contention issues.
Once you've done that, power cycle all your wifi gadgets to make sure they have a fresh connection to your mesh. I did notice that I had to redo the network set up on my Blink Link (video camera system) box again following the change, as it was behaving a bit strangely. All my other stuff (phones, tablets, laptops, kindles, chromecasts) were fine.
