Product review (4 stars): Sometimes it works, other times they do not show in my profile as connected
Been using this since Monday of last week, and so far I have three units in my cases.
It works OK, but some of the units under my Android app show not connected, with only one connected.
If I reboot the phone all three will show, but some will loose connectivity an hour or so later.
Would give it five stars if all three showed connected all the time when the phone is 10' from the guitar cases and sensor.

I also have the app (iPhone one) on my iPad Air, and it always shows it is connected to all three.
However the app does not fit the iPad window, and the temp and humidity numbers are cutoff.
D'Addario needs to release a dedicated iPad app.

Also I left the iPad running the app and went to a movie Saturday, and I logged into the app via my phone hoping it would show the info, but it did not, it showed all three sensors not connected.