What's so great about it?

Fast speeds for pretty low prices. Our friends are in the Kansas City area and it's $100 a month for 2 gig speed. $150 will get you 8 gig and they are rolling out 20 gig along with a new Wifi 7 router for $250 a month

Underground. Other fiber in my area is aerial.

Lol...

First of all, anything over 1Gbps is pretty much useless or overkill. I'm fairly certain no one on this forum could tell the difference between 1Gpbs and 8 Gbps, from the carrier. Most devices can't even exceed 1Gbps. Wifi 6 and Wifi 7 can support speeds over 1Gbps, but does the device connected really take advantage? Does the router and modem really support it? Even if all of that does, data is a two way street. If the servers or path back to your home don't support those speeds, then you are throttled from that side.

Also, AT&T home "fiber" does offer symmetrical bandwidth. I have a 1Gbps symmetrical connection from AT&T for $90 a month in Houston.

The question would be if Google Fiber offers any form of SLA, or if their infrastructure is more resilient, or if they offer better customer support. Speeds, bandwidth, and price are all comparable to AT&T.

In SA, people seem to constantly post about outages, or at least they did last time I checked. They were always getting small bill credits because of it. Never had issues with ATT.

I live in SA, they rolled out google fiber to my area and in the last year I've maybe had one outage and that was due to the city. For 1gbs I pay $72