I recently got a Fenix 7, but not for sleep tracking purposes. I find it ok. I definitely think it isn't great at measuring wakefulness at night, but I also have a very low HR and high HRV (while awake), which so this causes the margin for error in the device to be very low.
As I usually say, all of the devices are good enough. You're getting historical data about what your body did. You can't go back and change it anyway. I don't see real value in knowing my historical sleep data.
As I usually say, all of the devices are good enough. You're getting historical data about what your body did. You can't go back and change it anyway. I don't see real value in knowing my historical sleep data.