Got the update as well this morning. I do have a couple (minor) gripes:
1. There is now a perma-clock in the Nav bar on the left. Can't remove it according to what I am reading.
2. In that same vein, Samsung has not yet updated Good Lock...the app that allows you to remove annoying things like the clock mentioned as well as the Bluetooth and Ringer and NFC icons. I had gotten so used to not seeing them. I am sure there will be an update, but it's a thing.
These are trivial/cosmetic in nature, so not really a big deal. Loving the new lock screen with the colored notifications and the UI just seems super smooth. Overall my 6-hour review is a big thumbs up.
Edit: Of course...they took away the ability to disable the Bixby button. Now the best you can do is set it to TWO clicks to open instead of one. I mean, I guess that's OK, but give me a break (I have no idea why this is a surprise to me).