I purchased my chicken door back in 2015. I live in Massachusetts and have extreme weather up here to say the least. This door never failed us. It has survived heat over 100 degrees, cold 15 degrees below zero and has worked in 3 feet of snow. The most impressive fact about this company is 7 years later I called for support and one of the owners (the guy on the video) answered the phone personally and walked me through my issue (which was the battery that lasted more then twice as long as expected). I already recommend this door to my brother and will continue to recommend this chicken door to all. If you divide the cost of the door by the two times a day for over 7 years this door has opened and closed protecting my girls it equals pennies for the convenience this product provides to any chicken owner. Thank you guys for everything and thank you for having the best chicken door on the market.