Looking at QS results it's nothing we don't already know. I find interesting the walking HR though, as my results are usually opposite. My actual walking HR is lot lower than registered by Fitbit. This may link to the fact that walking is a very low effort (my HR doesn't elevate much when I walk, it's in 60bpm-70bpm). On the other hand Sense 2 does a good job when being in total rest (night time) which QS tested with sleep stages but I can see it in the night HRV trends. The accuracy of trend (not absolute values, this is unmeasurable due to using different algorithms and Fitbit hides all data anyway) I test against Garmin watch and when two different watches agree (and in this case they do) it gives a reason to assume a good level of accuracy (if they wouldn't agree the result would be inconclusive as it's either only one is right or both are wrong). I found similar result when it comes to the GPS and the fact Sense 2 disconnect under clear sky doesn't help. One of my races resulted with several such disconnections and overestimating the distance by 1.45km (should be 21.1km). I noticed the quality of GPS depends on the location. What I mean here is that the location may ne under clear sky that other GPS devices work fine yet Sense 2 will consistently struggle. In some areas the GPS never gets better, fails all time. On the other hand, where I live and where I work (two different locations 50 miles apart) the GPS works really well. If that observation is right that would make some users very unlucky just because of the location they live at and would explain why some users can't acquire connection no matter what they do while others have no such issue.
