We have three prongs for our three. Zeke can walk well without it. He went to obedience school and is very good for J to walk. But he has a longer coat.. and we have hemp/fleece collars.. and if/when he pulls, he slips right out of them. So we walk him with the prong just so we know he wont be escaping. Bunny will pull your arm off w/o the prong. She also walks with a backpack these days.. and 6 cans of veggies to give her a good workout. She's a high strung dog, came with lots of mental baggage, so she needs a lot of direction and control. Both Zeke and Bunny are dog aggressive too, so I need to feel confident when I am walking that there is no possibility of them getting loose.

Eli now walks with one as well. He's a puller, always has been, even at 5 months when we got him. The prong works very well to keep him close.
I also walk E and B on a Y-lead (2 dog walker thingy) so they are quicker to react and easier to control with the prongs.

I understand where some might see it as a dangerous tool.. or where the negative stigma is coming from. If we take Eli into Petsmart w/ a prong, people as "Oh is he friendly?", etc.. like he's an aggressive mean dog that we so carelessly brought in a dog store. With his regular collar, none of those silly questions. And Yes it could be harmful if a dog was left unsupervised while wearing it and they got caught on something... But when used soley for walks, or when on leash, whats the big deal?

I need control of my dogs. We have tried so many other methods; Choke chain, harness, halti, regular collar, a woven slip collar, etc. Bunny escaped while wearing both the halti and the harness (not at the same time, but escaped while using each), dont ask me how.

Use what works, and to each his own.
But sign me up on the Pro-Prong list as well!