Product review (4 stars): Great customer service
First copy was dead on arrival.  Call to support was routed to "George" in Customer Service.  Left a message and he returned my call within 24 hours.  D'Addario sent a new copy and a return UPS label for the swap.  Replacement paired flawlessly and has been gathering temp and humidity data once an hour.  So far so good!  Four stars for the great customer service!