well after pulling whats left of my hair out. i finally sent my AT pro back to garrett for repair. it was driving me crazy first i thought the head phones were bad then the coil until i realized the problem is intermitten one day it works the next day nothing it turns on and powers up but wont read anything metal. good thing its still under warranty i hope they get it back to me soon i just got permission to hunt some property at work which will be developed soon. if anyone has any garrett customer service stories good or bad please share them with me ive had nothing but great customer service from them so far but you never know