Customer experience may vary.

I used to have the internet formally know as Qwest, & it was more than terrible. I was paying for 7Mbps, & I know you're not expected to reach what you pay for, but I was getting less than 1Mbps most of the time & it felt like dial up. It was all over the place, always timing out and going down, even with new phone lines. Customer support would say they were working on an known issue and it'd be fixed at such and such a date, and when said date past and nothing changed a week later, it was some other issue. So I switched to what was a lesser evil, Charter, and I'm pretty satisfied, much more reliable and stable, the worse thing I have to deal with is them nagging me bundle their other products, which I have zero interest in.

It is strange though, I have a friend in the cities who had Quest, and it was the polar opposite of my experience, a positive one. So it's a roll of the dice I guess.