A couple of quick observations after 60 minutes of use. The ‘Applications’ app which replaces the Launchpad, doesn’t appear in the dock when opened. It also doesn’t have a menu bar so it’s just a shortcut to Spotlight. As I didn’t have Launchpad in the Dock, the Applications app isn’t in the Dock so you need to drag it from the Apps folder
Also on Applications, when you open the app it shows all applications from both your Mac and your phone! There’s not even a way (that I can find) to filter them out. You’d think one of the ‘group’ options — along with Utilities, Productivity or whatever — would be iPhone, so you could hide things you’re never likely to use. I’ve not used Launchpad or Spotlight for launching apps so I’ll do what I always do - have an alias of the Applications folder in the dock and launch from there.
General appearance of Tahoe is OK but the additional rounding on the windows feels odd when trying to resize. Apple Mail looks like an app from OS 6 days - it’s downright ugly. Of course this is all subjective and others may love it.
On a more positive note, I’m yet to find an app which doesn’t open. I was a little concerned about FMP 19 but it started and opened my primary database. I’ve not tried to edit anything but fingers crossed it’s OK.