I've shared my suddenlink horror story before, here it is:
between July 1st and September 1st 2018, it took 31 phone calls totaling 434 minutes, 6 technician visits, and $389.70 (not including my monthly internet bill) for
Suddenlink Communications to finally send someone out to fix my internet. They reran the line from the main junction to my house, made me buy a new router the whole 9 yards. It never got fixed - I had outages multiple times a day, and when there was internet is was 1/10 the speed I was paying for. I just accepted the fact that I would have ****ty internet. Once I moved, I was setting up the internet at my new house and while on the phone the support agent noticed that they had my router registered as something different than what it was and what they had my router registered as was not compatible with the service I signed up for....
When suddenlink works, it works great. but lord forbid you ever have any problems because it will be countless hours waiting on the phone and incompetent techs.