Ocean band is gorgeous but a little bulky. I don’t like the alpine band that much. Every time I take it off I have to be so careful because the hook might bang against the watch. So it’s not as comfy as the trail loop and not as aesthetically pleasing as the ocean band (just IMO). Also the knockoffs are good (if you get the kinds that don’t add the additional latch/loop now due likely to apple cracking down).
Ultra 2, I love how it looks and the battery life. The flat screen is so aesthetically pleasing to me and it just feels like a really different experience after having an s4 for so long (upgraded this month).