Agreed. I must be running a lucky streak. All of my Sonoff devices shipped with full batteries, paired easily (I do so within 10 feet of hub), and operate as expected. I did a "hygrometer salt test" to confirm the accuracy and was delighted to find the SNZB-02 to be with a percent or so.
Our sensor is just laying on top of a cabinet that is between the shower and the fan. When the shower is running, readings typically jump from about 40% to 90%. Again, those readings may be 5 minutes apart.
