I used to have a prong collar for my mutt. I understand a lot of people don't like it, but it worked instantly for me.I personally feel like I dont have control. Some people are able to use them but personally I cant. Though, I feel like I have no control over the dogs with any type of harness. I have been a fan of the flat, martingale, and the prong. Maybe the halters can work for you, but personally its not for me. Just like the clickers work for some, and not for others.
See I start my training off with a smaller flat collar, though do love the look of a wide flat. Like you said its on the dog and the handler. Prong has done me wonders and have only come across 2 dogs that it never worked for. One was very timid, the other the owners abused the shock and the prong so much that it didnt even register anymore. I didnt have enough time to work with the bull headed dog. Though the timid one benefitted more from clicker training, personally dont care for it. Again the timid one was sent to a trainer in ohio who was just to heavy handed with her. She was timid before she left and he really messed her up. My mothers cocker only needed a flat, and my current dog sadie is only using a flat.My old girl used a prong, all 6 of my sisters dogs used a prong, used a prong when working with the neighbors doberman, friends border collies, beagle, and some others.I used to have a prong collar for my mutt. I understand a lot of people don't like it, but it worked instantly for me.
It depends on the dog and the trainer, but the prong and the wide collar (like Stillwater sells) have never let me down.