The rating is relative. My dog is a 7-year-old male Labrador, weighing 40 kilograms, neutered. Unfortunately, he has anxiety attacks when I leave him alone at home with my other female dog, and I have to be away for 10 hours at work. He has had this since he was little, but to a lesser extent, I suppose, because in the new house without a yard, for the past 3 years, he has been indoors and tries to eat the door and window out of his anxiety. So, to tell the truth, I didn't expect a significant change with the collar. Possibly, in the first few days that I put it on him, it affected him and calmed him down to some extent, but after 10 days, he was probably a little calmer, I would say. The truth is that in my case, I need communication with the dog before I leave, so that he is calm beforehand for the calming effects to work. After 4 weeks, I would say that he is generally 40% calmer, but I still follow the necessary process before leaving him. So, I would recommend the collar to someone who will also engage in training or proper communication with the dog and is in the beginner stage so as not to acquire a large emotional negative load. In other words, as a supplementary aid. I will probably buy it again to continue the process and see if his calmness increases gradually.