What a struggle its been with the Deco XE75 Pro.  Current setup:

Xfinity Gateway/Router - setup with Bridge Enabled (no wifi access)

Deco XE75 Pro (3 units) - 1 in office (main unit) 1 in kitchen, and 1 in family room

Download speed to Xfinity gateway is >1200Gps

After setting up the mesh system last weekend I noticed I wasn't getting the full download speed as I did with just the router gateway, I expected this not a huge deal but still 800Gbps is less than what I got before.   Anyway the first day it seemed to be working fine, overnight some thing must have happened and in the morning all 3 units were red.  I confirmed the Xfinity gateway was working and receiving data from the ISP.  I removed the whole mesh system and reconfigured it to get it working again.  Took many tries to get this resolved.  I also made sure the latest firmware was installed.  System seemed to work without issue until today.  Around 11am, ISP went down.  Received alert via text that there was an outage in my area and it would be back up by 2pm.  Before 2pm received text alert that the outage was resolved and that a reboot of the Xfinity gateway was recommended.  I did so and the connection back to the ISP was good and still configured for Bridge mode.  Unfortunately, the Deco mesh did not reconnect.  I rebooted the main and all the other units, still nothing.  Tried to remove and reset each unit to start from scratch, not luck on getting them up and running again.  What a pain!!

Decided after several hours of messing with it, just to remove the whole mesh setup and reconfigure my Xfinity gateway back to disabling Bridge which mode it and run as a router again.  Everything is back to normal.

I bought the system from Amazon and decided to return and exchange for another setup, same XE75 Pro.  I'll try one more time, if this doesn't work I'll have to go with another mesh system alternative.