I have the note 10+ and I do think it's worth the upgrade. Disregarding the camera, which I view favorably so far:
Size and weight : I'm am a taller person, so larger phones don't bother me. Regarding physical dimensions, I don't notice a difference to the note 10 +. I also appreciate the weight, as it feels solid like the iPhone 11 pro max.
Screen: Coming from iPhone to the note,I really appreciated the notes screen. The ultra screen is even better. Visually, I don't really see how you get any better. The whole punch is barely noticeable (less so than a notch), and the curve of the screen is way less aggressive, whixh I appreciate. The refresh rate....wow. For reference I had the pixel 4 xl for a short period and didn't really notice the 90hz as a major differentiator. The 120 hz is very noticeable, and combined with the speed of the OS, it feels like the smoothest iteration of a smartphone UI yet.
Software oddities: the note 10 + is a great phone and probably the most stable and big free, for me, when compared to the pixel and iPhone. That being said I had odd little things that annoyed me, such as a laggy multitask/recent apps display (unless I used goodlock to change the animation) when using a password manager. All those issues have been fixed, and if you prefer gestures over software buttons for navigation, the ultra gestures are smoothed out and feel like the pixel /iPhone (this may be fixed on the note with an upcoming/recently released patch. Also....it only took Samsung ~ decade, but one UI is great, and really excels in novel and thoughtful ways, such as one handed mode and app caching.
Battery : all day/great. All the phones mentioned here hit that mark, and the ultra is no different even with 120hz.
It is worth noting one thing when considering my opinion, and it is that I got the note semi recently for nearly $200 less than the Samsung trade in value. So that made the ultra cheaper and all the more appealing. I am not adverse to expensive phones, until recently I upgrade and used the top end iPhone for the last 3 years. That being said, the note 10+ is a darn good phone and I wouldn't hesitate to recommend it to anyone.