Fantastic!
I bought this collar for my two dogs who love to bark at other dogs, kids playing, or pretty much any noise they hear in the back yard. They are small (around 8-10 lbs) so I also purchased the shock "resistors" to reduce the strength of the shock. I felt bad when I first put them on, but all it took was one correction for them to understand. Now they are bark free and only wear the collars every once in a while. Thank goodness we found something that REALLY works!!

Pet-Safe PBC -102 Collar a Life Saver!
My sister had been staying with us for some time after selling her home. Her west highland terrier had been a barker for some time and was getting worse in his new surroundings. This was causing much stress among us. Finally my sister agreed to try a PetSafe PBC-102 No-Bark Collar and I ordered it from Amazon (through Mutt-Mart). The change was amazing! This product was literally a life saver! Yes...I won't lie...the dog let out an initial minor yelp or two, but he learned within about 36 hours and the house is once again virtually SILENT. (Even without him wearing the collar!) I certainly credit Pet-Safe for an outstanding product. DON'T WAIT...the dog should not suffer through fear, intimidation and constant scolding. He doesn't know any better. But now you do!! Let him (or her) teach themselves not to bark!

Works, but better options out there
This product works as advertised but we recommend going with the better version from this same company that has the sound + vibration detection as it has some better options. This is so it does not accidentally shock your dog even if it has not barked.

This product works
First I tried the citronella spray collar. The first day my dog was confused and he did not bark. By day two, he figured it out and it was no longer a deterent. By day three, I think he actually liked the spray.
I was initially put off by the "curelty factor" of a shock collar, but something had to be done to curb his barking and calm my angry neighbor. I have to say, it works just as advertised. It does not administer a prolonged shock, but instead gives a quick 'sting' followed by a pause that allowes the dog to learn to stop barking. After 3 days, he only needed the collar when left alone in the yard. Now, he almost never wears it at all. This is a very good and very effective training tool, and is in no way some kind of doggie torture device.

A Lifesaver For Ones Ears...
I reviewed alot of no-bark collars and just from the reviews alone and the price it was a must have. We went from a barkin' Bichon to a now quite and reserved Bichon. This collar has made a world of difference and is worth EVERY penny! Great seller and an awesome product! It really works and is not harmful to the dog. Buy the collar and the 2 extra batteries as a set for the best value online.