With my dog I've been practicing for 4 years with all the methods and taste. He wanted and could not bark without endlessly alone remain. Behavioral therapists and dog trainer could not figure form what they could do even more. There was No apparent pattern of his barking habits. Now he has worn the collar turned off for 2 days and when it was turned on was after the first spray out immediately the respect, or by scaring the link exists. I must say that I have long been splattered with him with a water pistol when he making that he should not (barking, feints, etc.) so I painted me a good chance from the collar. The time frame of the "correction" was but to create not always so fast, so I longed for an alternative and I sometimes 1 hr. Can without him leave the house. I had 2.5 years ago, talking about one of an expensive variant (with lemon scent) and had only initially. He remains with the collar without a sound alone, even if he just wears it he pulls a lot more together because he thinks it might trigger, but is not afraid. as the collar after 7 puffs stopped working I have the seller informed. Was communicated to me that this was not a defect but only the pressure could not escape and it was blocked by it. Now it works again. I hope holding the action, I will attach the collar every day but rarely turn on and hope for a long life. For the value for money is top. Less than an hour the dog trainer or therapist)