First let me say that of the 3, the screens have been sharp, clear. I think the whole pink thing has something to do with batches from the facility that produces the Sapphire ones.
This watch came with 3.1 firmware (Thank God). I"M NOT UPGRADING IT!!!!. It's a very new serial number, much higher range, in the realm of 30k higher.
Heart Rate works: check
SPO2: check
Music flawless with my airpods: check (in fact sounds better than my AW)
Running Dynamic pod works right, and registers: check
Everything just works! (of course sync and weather problems, but that's all on GCM)
Apple iTunes playlists properly load onto watch: check
GPS works well: check
Swimming HR works well (thank god): check
WiFi: No problems, check
Garmin Pay: Check, works.
I had forgotten just how miserable the updates from 4.1 on made me with the problems of my watch. I honestly thought they had 4.1/4.2/4.3 and the sensor hub ironed out when up updated my previous watch. Well, they didn't and I was very sorry for that. So I returned it and now I've got a watch that feels like I got what I paid for. no complaints on the watch now. Just GCM monstrosity.