I picked up a Aluminum S2 last week when they went on sale because I didn't want an LTE watch and I liked the idea of the sapphire back. It was my first AW and honestly I wasn't that impressed. I liked it but everything seemed a little slow to me. I guess I'm used to the iPhone 7 being nice and snappy. I decided to place an order for a S3 and compare the two. If they seemed similar then I'd just keep the S2 and return the S3. First thing I noticed was the setup. I didn't time it because I assumed it would take an hour or two as my S2 did. It didn't. It was done in maybe ten or fifteen minutes. Now I'm not sure if it's because it was loading a backup instead of setting up as new. Does the load from backup take that much less time? Next is the UI speed. It is NOTICEABLY much faster. On the S2 when I would swipe watch faces it seemed to lag and sometimes take a few swipes to move to the next face. With the S3 it is super fast and smooth. Opening any app is almost instantaneous. This is the watch experience I was expecting. I will be returning the S2. I'm disappointed that they went with a composite back but hopefully it wont get scratched up in the two or three years I plan on keeping this.