I prefer the prong collar. I confess I originally thought they were cruel, but after having used just about every collar out there except a prong on Nikka to try to get her to stop pulling, I gave in and took her to a trainer. She recommended the prong and though I was a little iffy at first I have to confess it's worked great. She'd choke herself to the point of coughing on the choke, but the prong, one quick "pop" and she remembers not to pull. Both of us enjoy walks more.