I have been shopping for an AAD. These guys seems to have been the leaders in the market. More costly than some others available on the market. I believe I will bet my life on this one. It will cost more in the short term, but piece of mind and the history these guys have is comforting. I did have a chance to meet Girard in Eloy AZ a few years back. He was out in the field checking on his products. That says alot to me. MM