Product review (5 stars): Best instructions ever.
Just received and put in service.  Instructions are very understandable which is  not the case for most other electronic products I have purchased at Amazon.  So far I really like this product and intend to by additional remote outside units.
Good job getting the instructions written in clear English.  Someone here knows what English speaking customers need.

I have not owned this product long enough to opine on material quality, battery life, or durability.  But I feel I will be satisfied with this product for a long time.