This is my second Herm Sprenger collar. My rotty outgrew the first, so onto a second. I love the quality, the blunt prongs, and the new quick release. Works very effectively. The only downfall is that he has a 21" neck and the collar is a 23" It is a little snug to be truely effective. It does not take into effect hair or the extra length needed to properly use this collar. Order bigger so you don't have to order extra links.
But I would buy this again in a heartbeat!