Long story short, I'm trying to upgrade my parents network and I'm looking for something that will just work reliably because the current google nest wifi they have is terrible and disconnects and has to be reset all the time (almost daily basis). I know running ethernet cables is the best option and I would have loved to install a ubiquiti system, but I can't for various reasons. I found the tp link deco px50 which uses powerline as the backhaul instead of wireless which is advertises improved speeds, but they don't need faster speeds. My only concern is the reliability, will appliances or other devices interfere with it? I'm not concerned with any speed benefit because they only pay for 400mbps symmetric fiber and never need more that 100mbps to a device. Thoughts on the px50 and using powerline as a mesh backhaul? TIA
Any that you would recommend specifically, I haven't been keeping up with consumer networking as much as I used to.