I recently installed Pop and did the upgrade a couple of days ago. The biggest change I noticed was the move to Pipewire. I have an external DAC on that laptop and it didn't work properly after the initial reboot.
It's working now though and I am not entirely sure why - there was nothing obvious in the logs. Otherwise, it seems pretty good (using the Nvidia version).
One thing that is bugging me a bit is that the much vaunted gaming compatibility doesn't seem to work very well on my hardware. Not that I use it for games but it would be nice not to have to drop back to Windows to play Cyberpunk 2077.
