I would give this collar five stars, and I want to. However, it has a dangerous flaw I never expected. Do you see that black Dazzber "brand label" on the collar in the picture? That is a protruding piece of rubber-like materiel that is sewn on (fairly well) and sticks out far enough that you cannot use that entire area for adjustment of length. It's a fairly long piece of rubber. So, of course, my pup needed to be adjusted right there but I could not because this was in the way. Also, thSee full review