My Beagle loves this brush. It is like a massage for him and he lays down ready for me to groom him as soon as I produce it. Great for de shedding and easy to hold in the palm of your hand, makes grooming easy.
My two dogs love getting brushed with the Zoom brush. The Labrador cross comes to me and 'asks' to be brushed, and sits quietly as she is brushed. The Jack Russell sits beside her waiting for her turn.
I have used it when they are getting a wash, but the main use is grooming. I think it massages the dogs and they like it. The large number of soft rubber/plastic cones must keep it a low pressure rub.
Nice idea. Useful in bath. Puppy enjoys playing with it and chewing it , seems to be robust enough so far.