@Thespoon Your original solution will work. You said you don't know the mesh systems, but you have made the best design for mesh system. Do not change it. You should wire the floors according to your...

@Thespoon I have similar size house with basement and two floors, and Deco mesh with M9 Plus units, running in AP mode. The following is based on my experience. What you plan will work, and if you...

@pirrus You do realize it is just a reporting problem by one of apps inside Main Deco unit, with M9 actually delivering more than 540Mbps, right? When I do speed tests on smartphone connected to M9 I...

@Bhooty I forgot to mention I run my Deco mesh in Access Point mode. If you run yours in Router mode, that will explain difference in available configuration settings.

@Bhooty See screenshot below, from Wi-Fi Settings screen in Deco app. Network isolation toggle is at the bottom, named "Isolated From Main Network," and it is disabled for my home network. It seems...

@pirrus May I ask how do you check Internet speed on M9 plus? I have Main Deco M9 Plus running in AP mode, when I use "Test Internet Speed" in Deco app I am never getting more than 550Mbps. Yet, when...