After reading previous reviews I had high hopes of having better control of my dogs on walks, but was concerned about a rash/wound forming under arm from rubbing friction. So here is my experience...I have 2 very large dogs that pull on walks and as soon as I put the harness on there was an immediate change in them. No pulling at all! I can even walk them with my kids & stroller which I was never able to do. And no rash or rubbing under armpit area. Best product yet!