Well guys, some 16 weeks after I posted about creating a Wi-Fi Mesh system, I've finally got around to doing it. The system is a Google Nest Wi-Fi router, with 3 access points.
I've set it up today, and the only reason it took so long for me to do it, was my hesitation due to my lack of IT skills, and the fact that SWMBO is part of an Emergency Response Team, and needs constant wi-fi and internet cover. Took us a while to get the kit as well, for reasons I won't go into here.
So, the good and not so good issues, the good first.....:-
(1) It was surprisingly easy to set up. You do need to download and set up the Google Home App (which we already had as we have a Nest thermostat to control our Heating and Hot water boiler).
(2) Turned off the wi-fi from my BT router, leaving it operating just as a Modem.
(3) Plugged in the Google Nest (GN) router, connected it into my BT router with the provided LAN cable, scanned the QR code on the base of the GN router, and then followed the instructions that appeared in the Google Home App.
(4) You have to re-name your wi-fi, and give it a password.
(5) Followed a very similar (but shorter) procedure to set up the extender (Access) points.
(6) It has worked well, and given me a powerful Wi-Fi signal over the 5000 sq ft I need to cover. See the pics. The first pic shows the coverage we had prior to installing, and the second pic shows the improved coverage on my phone.
(7) It's quite an attractive looking piece of kit, which will blend with any decor.
The not-so-good points....:-
a) The system is expensive, so you'll need to hunt around for the cheapest deal.
b) You need the Google Home App, which is free, but a little complicated.
c) Each access point is both a speaker, and contains a microphone, enabling playing music wherever you want across your site, and using the Google Assistant - personaly I find that a mixed blessing...
Other than that, I'm quite pleased with the set-up and operation.