So I just shipped back off of my DirecTV equipment and we're 100% in on YouTubeTV. I put an Roku Ultra on my main TV, and a Roku stick on each of my other TVs. Super easy to setup. Took just a few minutes per Roku. The part that took the longest, was that YouTubeTV didn't pull over my family profiles (each family member has their own profiles for favorites, DVR, etc.), so we had to login each kid individually to YouTubeTV on each Roku. So that took some time. That seems like more of a YouTubeTV app shortcoming than a Roku problem though.
So far so good. Even with the wife and I watching TV, a kid or two on their small-screens watching shows, and the boy playing Fortnite, I've only experienced a "buffering" issue once or twice, and it was only for 2-3 seconds. HD picture quality as been amazing, even better than DirecTV I feel like.
Plus, I didn't realize this, but our Amazon Prime subscription comes with HBO Now? So we can watch HBO movies, series, documentaries, etc. We don't have it "live" in YouTubeTV, but that's fine, because I never watch live TV unless it's a sporting event anyway.
And speaking of sports, since there's no Hawkeye sports on yet, I tested it out with the World Cup and US Open, and it works great. No problems whatsoever. Tried to watch Twitter closely and watch the events, and it didn't seem like there was really any delay between those updates and what I was seeing on the TV.
So far a great experience. Next is to figure out how to tie it into my whole-house stereo so I can pipe Pandora/Spotify throughout the house.