Astound internet

My sister is paying Xfinity $200 a month only for residential Internet, which is insane, so I'm looking for alternative

Looked up her neighborhood, AT&T fiber isn't available, and I assume neither is any other fiber option. I don't want to use AT&T air and the likes.

There's Astound (coaxial). It's $20 a month (after auto pay discount, plus taxes and fees) for 300mbps first 2 years. And a rep told me it will go up $15 EVERY year afterwards. Maybe I misunderstood him or he me but that was what I got

Question for people with astound cable internet who have been with them a while. How much are you paying? Are you satisfied? How are their speed and reliability?

Thanks in advance