To really use the Google product as your router you turn your combo router+router into a modem only.
Did you do that?
Hello all! My household got Google WiFi a few months ago and it was spectacular. Great speed and coverage in the whole house. The problem was that the WiFi devices couldn't see the devices connected to my ISP's router through ethernet, which meant that my printer was inaccessible from the desktops and that my phone couldn't find my PC to stream/transfer files when I wanted.
To fix all this, I disabled the DCHP on the router and made the Google WiFi our main router. After a rocky start setting up my Plex server and resolving a Double NAT issue (at least, I thought I resolved it) everything worked ok for a bit.
This past week though, it started acting up. When loading a webpage, it will (about 40% of the time) fail to load and list DNS as the issue, or it will just spin like it's loading and never actually load until I retry the page. This has been happening more frequently on my phone, and I've been leaving the WiFi off to just not deal with it - apps wouldn't update, it would have trouble contacting Google's servers, and it would load slow as hell.
I thought it was just me, but my friend reported running into the same issues today. Since I know it's not confined to a single computer on the network now, what's my next step in finding out the problem? We have Frontier FIOS, so our up and down speed is blazing when we test it. Did I configure our router wrong? Is there too much traffic for the Google WiFi router to handle? Any suggestions on what to try next would be greatly appreciated. Thank you!

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic