As time passes, I'm increasingly happy with Charter's internet service. The only issues I've had with my internet connection is having to reset the modem/router about once every two months when it hiccups, which is something you'd have to do with any internet provider, in my opinion.
Probably the most annoying thing about Charter is that they constantly spam you with their promotions. They send a lot of spam mail and they even call your phone. No, I don't want TV. Yes, I'm pretty sure. Why in the world would you call me during work hours to advertise to me!?
But really, ever since I configured a wireless router myself, the internet itself has been fine. I haven't personally run into any of the horror stories listed here.