Coming from watch 4 classic, I expected a huge battery life. It gives a solid one day battery with AOD on. No ground breaking differences compared to 4 classic. I would at least expect to see some UI changes.
I had a Samsung Galaxy 3, Frontier which finally gave up the ghost and bought the Galaxy Watch 6, Classic, Bluetooth. Nice watch, but has so many features/capabilities I'll never use them all. As I did with the Frontier, I've ordered a third party, metal watchband; not a fan of leather or rubber watchbands. Get one, you won't be sorry.
It took me a long time to finally buy one of these watches because I didn't think I would use it for anything else except telling time. I've had the watch a couple of weeks already and find myself using it for a lot more. The obvious health stuff is great especially the sleep tracker. I love creating watch faces and I find some of the apps really useful. One of the best features for me is that I don't have to pull out my phone every time I get a text or notification. I can just look at my wrist.