I have a fairly small 4 bedroom house and bought a 3 x P9 system as I need a reliable network for my work. These proved to be insufficient and couldn't reliably fill the house so I bought three more. They are now around 8 - 10 feet apart and I even have two in the same room but STILL one or two of them constantly become unavailable and devices connected to them go offline.
I really wish I'd stuck with my single router which worked perfectly on its own over 95% of the house.
Does anybody have any advice or should I just give up and go back to my old router?