In Washington, I've been pretty happy with Frontier. Well, "happy" might be a bit strong. Frankly, I rarely give them much thought. $60/month for (I think) 35Mbps up and down. Every single time I've actually checked it, it was indeed what they claim, and it rarely goes down. (About once every couple of months it'll go down for an hour almost exactly at 2300 or midnight; I assume some kind of maintenance.) I don't have to call them once a year to keep the same rate; bill shows up, I pay it, they keep giving me solid, no-bullshit service. Of the few times I've called for support, it's been a small wait and they quickly fixed the problem. My feelings about Frontier are about the same as I have toward the city water utility: I turn on the "tap" and internet comes out, I pay the bill on time every month, and rarely do I give it another thought. That might sound like damning with faint praise, but I think it's the highest praise possible.
Contrast to Comcast, my old provider. Fluctuating rates, horrendous customer service, advertised speeds that are nowhere near reality (I had 12Mbps package back in the day; it rarely was good for more than 3Mbps), and as reliable as an old Fiat. Oh, unlike the city water utility, do I have feelings about Comcast. The last time they were at my door I told the salesman I'd do without internet before I'd give another dime to them. Ironically, Comcast were the ones running billboards about how horrible Frontier would be when Verizon gave up on fiber and sold it to Frontier. Yeah, well, I've been a Comcast customer and I don't see how it could possibly be any worse. Turns out Frontier is just fine.
But you're not going to get Frontier unless you live in western Washington outside of Seattle, so this probably isn't much help.
I have Frontier as my ISP at my rural home on the outskirts of Cleveland. The speed isn't amazing (10 Mbps down, good enough for our streaming needs), but is at least fairly consistent and pretty cheap. Service has been pretty decent too, line faults are usually addressed within a day.
But I've heard that experiences with Frontier are a very localized thing and can be pretty dramatically different from place to place. Which at least contrasts to TWC and Comcast, where people pretty universally seem to despise dealing with them.
This county (Medina) is actually crawling with dark fiber infrastructure, with some business and gov't utilization. I'm patiently waiting for a residential service ISP to pop up. As far as I know, there are not any municipal agreements that would block it.
Sorry about the outage two years ago, I was a new network engineer then and deleted all the residential DSL customers on one of the major Frontier routers in Washington. Lesson learned: never touch anything you don't fully understand
Contrast to Comcast, my old provider. Fluctuating rates, horrendous customer service, advertised speeds that are nowhere near reality (I had 12Mbps package back in the day; it rarely was good for more than 3Mbps), and as reliable as an old Fiat. Oh, unlike the city water utility, do I have feelings about Comcast. The last time they were at my door I told the salesman I'd do without internet before I'd give another dime to them. Ironically, Comcast were the ones running billboards about how horrible Frontier would be when Verizon gave up on fiber and sold it to Frontier. Yeah, well, I've been a Comcast customer and I don't see how it could possibly be any worse. Turns out Frontier is just fine.
But you're not going to get Frontier unless you live in western Washington outside of Seattle, so this probably isn't much help.