Tried it on yesterday at the Apple store. Surprised by how light it was compared to how heavy it looks. Was still indecisive between the Ultra and 45mm SS S8, so I went home. Slept on it and decided on the Ultra, unfortunately the Alpine loop models were sold out but I did find a nearby store with the banana yellow band Ultra so I ordered that one for same day pick up.
In the process now of updating my phone before setting up the watch. This is going to be a huge upgrade over my 42mm Series 3.
My only grip trying it on is how sharp the edge is, like it can easily scuff something. Anyways if I end up not liking it, I do have 14 days to return it.