I'm giving up on my Google wifi mesh system.
As I've posted before, I have a long rectangular house build in the mid-1950's. That means lots of cinderblock and plaster walls. It's a wifi nightmare.
I had been using two AirPort Extreme AC routers on the same SSID (and password) but never managed to get good coverage across the house. Something would always drop out -- either a far-away NetCam or someone's laptop would keep flipping across the two bases and end up stalling. It was very frustrating.
So in an attempt to improve signal strength, I decided to try the Google wifi multipack. I was hoping the mesh network, bouncing from one end of the house to the other, would cover all the corners and help things out. Trouble was, no matter where I positioned the devices, I couldn't get a strong enough signal to the farthest base to produce good throughput. My 75Mbit/75Mbit FIOS which would actually register as 80+Mbit/sec over wifi near the first base station would sometimes go as low as 20Mbit at the far end. Not sure what the local LAN speeds were at that point, but couldn't have been good. And with my server/NAS at one end and my laptop at the other, this was making for some very slow transfers. And for the first time this weekend, I was unable to maintain Netflix streaming on one TV if someone was streaming something else on another.
So, since I'm unable to get Ethernet (easily) from one end to the other, I invested in two coaxial MoCA to Ethernet adapters (Actiontec) and put all the coaxial cable already in the house to good use. Though I had to spend some time strategically hiding the MoCA boxes so they weren't out in the open (wife's request), I'm getting excellent speeds over the coax (around 300Mbit/sec) and it effectively gives me Ethernet in two additional rooms.
Armed with two new household Ethernet ports in strategic places, I put back up my two Apple AirPort Extreme AC boxes and purchased one more AirPort Extreme AC router with help of a few Best Buy rewards bucks. The main FIOS router serves up IP addresses via DHCP and the three AirPorts are acting as wireless bridges in bridge mode (not as wifi extenders).
I'm now back in business with 300Mbit LAN networking from one end of the house to the other, strong wifi everywhere and -- so far -- nothing dropping out or stalling. And even my iPhone is able to saturate my 75/75Mbit FIOS internet service over wifi.
Not the cheapest setup by far, but after over two years in this house, the wifi network as never been running better.