This collar is the best one I have used. Nothing has stopped my dog from barking at the tv or people walking by like this collar has. I have tried the box that beeps to the sound of a bark and that didn't stop him. I was skeptical about this collar but I let the collar lose on his neck and do not have the shock feature on. I only keep it on the beep and the vibrate and it works!
The customer service responded quickly to me, and I received the product 2 days after I placed the order. Overall a great experience :)