Works great. I have a dog that got away from me in the woods chasing wild pigs. I began using the trainer and she has never gotten away from me again, and that's only with the sound application. It is nice to be able to let a dog run, and this allows that with enough control not to encounter injuries.
I own the remote correction collar. It does work, however is very cheaply built. I also have problems gettting the batteries in the collar and have to use something to guide them in. The remote cracked on the inside were the battery goes and was always losing connection. This was like this after the 3 time of use. We had to put a piece of paper or cardboard in it to hold it in place.