I have had my Note 20 Ultra for maybe 3 weeks now. Although it seems to be a good phone, it's really not that much better than my Note 8 was. I have honestly considered returning the Ultra and just using my 8 for another year. One issue I have is that face recognition just refuses to work. Nothing, zero, nada. I have retaken the photo several times. I have done the alternate photo too. I tried turning it off, rebooting the phone, then turning it back on again. It never works. I also find the finger scanner to be very finicky. It seems like I have to type in my password about a third of the time.
Lastly, I have had some issues where if the phone loses 4G reception, it takes for ever to regain it, even if in an area with known reception. For instance, I go into my man cave (which has metal siding walls on the outside) and I can lose all 4G receptivity. When I walked back out with my Note 8, it immediately picked the cell signal back up. In some instances with the Ultra, it has taken 15 or more minutes for the phone to realize that 4G is available again and connect.
As for positives, pictures and videos look better. I like that I can directly connect a USB microphone and make good sounding videos. There is also way more storage on the Ultra than on my old 8. Speed is a little faster, but nothing that really makes a difference for anything that I do on a normal basis (I'm not a gamer).
I am really hoping that the newest Android update will solve some of this.