I have the Galaxy Watch Ultra that advertised upgraded sensors for better sleep tracking (I have some very serious sleep issues and want to track my sleep closely). However, I submitted an error report to Samsung Support because, apparently, the Sleep Score is based on how long I have Sleep Mode enabled on the watch... not my actual sleep time. WTH, Samsung??? I put the watch in Sleep Mode so it doesn't light up when I turn my wrist: but I'm not asleep yet. My Sleep Score is low because of "excessive sleep time" - even though my actual sleep time was 7-1/2 hours! This is BS and it needs to be fixed in a hurry.