Downgraded to 600 mbps today, even though I should probably downgrade lower than that. Had the 1000 mbps service for a week now, switched to Comcast's modem and everything. The average speed on 1000 mbps I was getting is 170 mbps down and 38 mbps up.
Regularly get in the 60-80 mbps download range. Had two service technicains come out. One rewired the whole house. Speed didn't change. Said could only gurantee 1000 mbps on ethernet. I get the same 170 mbps download speeds through ethernet.
On 2.4 GHz band I sometimes only get 5 mbps, Netflix regularly siezes up on the TV. Really misleading and I'm tired of the blame being hoisted on me, when the service was somehow faster when I only had 250 mbps plan.
Also, the wifi extending "pods" merge 2.4 and 5.0 into one band which has an affect when setting up IoT devices like Philips Hue, Roomba, that only work on 2.4, or devices like Google Chrome/Home that NEED you to be on the same band on your smartphone app or laptop to setup the service and you cannot choose.
Overall not happy.
FWIW, I have 2 computers on my network and one got advertised speeds and one was slow, after alot of research it turned out the slow one had a faulty wifi card, i changed the wifi card to a new one and now it gets speeds like the fast one. I always thought they worked or they didn't, that dont seem to be the case. Also you should check the specs on your wifi card, I find alot aren't designed to get gigabit speeds, for example my cards are limited to 768 Mps and on a old one I have its limited to 300 Mps, just a thought