Comcast Business Tier support had been decent. However, now they threaten a $99 service call charge if they can't replicate the issue or it goes away by the time the tech shows up. Response time is usually within a day but for something up the network a bit they'll just throw blame at the customer and bill them.

Otherwise, I will say that lately their commitment to keeping equipment up on the east coast has been admirable. My house has been without power since Friday but they threw generators on all the fiber nodes' power supplies to keep things up. pic: https://pbs.twimg.com/media/DXjUdljXUAElsRX.jpg