I have lived in several second-world countries. The internet service there was faster and more reliable than Comcast/Xfinity in California.
Comcast has a 1 star rating in Consumer Reviews - that's with over 1,000 respondents. My pingplot is consistently in the red. Pretty amazing, considering this is the East Bay. Currently I am pingplotting a Dell.com connection.
It is nothing but red. It starts with the first hop (220.127.116.11) and never reaches its destination.
I do not understand why Comcast customers accept this. (I am consigned to my landlord's connection, or I would have cancelled long ago.)
Reason of review: Damaged or defective.