I knew Comcast was the worst company in the world when I signed up, but AT&T has not run fiber to my neighborhood yet, and they are the only competition in Memphis. They butchered the install process, but all worked well for a couple years.
Then, a month ago, inexplicably, my Internet access dropped EVERY TIME IT RAINED. It would be out for hours. The useless morons at the level one help desk in Singapore or the Philippines, were, as usual, useless and annoying, when you could get through, when you weren't getting disconnected after getting in. An onsite tech told me I had "low signal" and someone else would have to go up the pole to fix it.
Someone else came, went up the pole, but it wasn't fixed. Comcast f***ed up and didn't show up for appointments to run new cable to my house not once but TWICE. After the second no-show, I fired them, but every waterhead you talk to wastes precious minutes of your life with their annoying retention efforts. I had to yell at everyone I was connected with in order to get them to shut up and cancel my service.
Comcast is the WORST company in the world, period, end of story.
They suck this bad because they know they can.
Review about: Comcast Internet Service.