I've been using YouTube TV for about a week now and I'm pretty impressed so far. I expected the DVR to be much worse than my Tivo Roamio and it is but it's still quite a bit better than I thought it would be. I expected buffering every time I fast forward through commercials like I get when I fast forward in the YouTube app but it doesn't seem to have to do that. The thumbnails when you are skipping forward are super helpful for making sure you don't go too far too. I'll still miss the Tivo auto-skip feature but the YouTube TV DVR is good enough for my purposes.
Picture quality is fine too. I do sometimes get quality dips for a second right after fast forwarding but this is much better than stopping to buffer every commercial break and the quality ramps back up very quickly. My only real complaint so far is the lack of 5.1 audio but this seems to be the case with all of these OTT services.
We'll see how the service holds up when thousands of people sign up for free trials to watch March Madness next week.
Unfortunately, you don't get thumbnails with recordings of every show -- at least I don't. Does anyone see thumbnails when FF'ing a new recording of The Walking Dead? I haven't yet.
One great thing about YouTube TV that PS Vue never got right is adding 1 minute and 6 seconds to each recording to cover when one show bleeds into the next or starts a bit early. I've noticed every YTTV recording starts few seconds before the actual show starts. That must be the six seconds. Then one minute must be on the back end.
I heard last night there were widespread issues on DirecTV Now and PS Vue during the Oscars. I had absolutely zero problems watching on YTTV. I took a chance watching it streaming rather than OTA, because I wanted to be able to pause for extended periods and then fast-forward through commercials, long acceptance speeches, and other boring bits. YTTV did not disappoint even streaming on multiple TVs simultaneously.
EDIT: Here's something else cool. I just looked at my recording of the Oscars and the time listed for it is 3 hours and 52 minutes, even though it was originally scheduled to run for 3 hours in the guide. I don't think PS Vue ever automatically added time to shows that went past the scheduled time slot.