Update went smoothly for me, no hiccups or crashing problems after it.
Biggest problem I've had so far, like jenda.69 mentioned, is the new accidental touch protection screen, not sure why Samsung felt the need to change something when it was already working well. I could not for the life of me unlock the screen.
Other than that, I'd say everything else is pretty good. Mini stutters from OneUI 4 are fixed, like the ones that happened often in the quick settings menu. Personally I prefer the animations from OneUI 4 but I don't have a problem with the new ones either. The new clock font options are pretty slick as well.
Lastly some nitpicks; The default animated call screen is gone which is a very minor thing but I did like that gradient animation a lot and how it changed according to contact pictures. New one is pretty dull. Samsung didn't make use of the new Android 13 media player either which is kinda disappointing but I don't have too big a problem with that.
Overall a decent update. 9/10 has a little something for everyone