I couldn't recount any terrible customer service anecdotes, and although they did hike the bill on at least a yearly basis, you could call and complain and they would re-promo you. My service pretty much always worked, and when it didn't, they came out and fixed it. I would respond that I never really had any issues with them. Terrible customer service, constant outages, and ever increasing bills.
People have always told me how much they hate Comcast.