Just a positive experience with Sporting Dog Company. I have a electronic collar with GPS unit for my pointers and it started acting goofy. I thought it was a battery not holding a charge, so I sent it in and in 3 weeks, they sent me a brand new unit with 2 collars. Mine was just a single mode. The unit was several years old and I was prepared to pay for any repairs, but they took care of me. Just happy as a worm coming home from a fishing trip!!