watching television shows from Hulu.com, for example, is frustrating as hell. The video is always "blocky", meaning the frame rate is like 1 out of every 4 frames getting displayed, which means the audio is out of sync with the streaming video. Then, for reasons $DEITY only knows, it'll freeze for several seconds - a lot.
Numerous calls over the years to Customer (Non)Support have brought guys out more than once to declare "Everything's fine", even when it isn't. In fact, the last time I called in I spent an hour with a script-reader in India who said, "Well, I get great response time pinging the modem, so we're not at fault". To which I replied, "my PC is connected to the Ethernet cable coming out of your modem, and I'm not even getting to www.comcast.com, so NOTHING IS FINE!" So he promptly transferred me to a 3rd party pay-for-the-support call company.
Several neighbors have AT&T and they say that's no better.
I hate utilities.