Our neighborhood was built out with fiber, but no cable. There wasn't an option to continue our cable services. I do like the speed though.We lucked out with getting fiber a year or so ago. I use their cell and TV service, but we use the local internet provider.
We also don't use their streaming box. Just the app on our Roku devises. We still get buffering occasionally, but not enough to really pay attention to.
CenturyLink has been worlds better than Xfinity on billing. The bill is the same every month.