Hi there!
I've found prong collars to be very helpful, especially with the stronger breeds and the really thick coated breeds. Most of my dogs are adult pitbull rescues (i.e. STRONG......very strong) and I find them a very good tool to use. Some dogs I am able to step them down to a martingale or regular buckle collars, but one of my dogs will always have to wear a prong collar when we go out. Of course they LOOK barbaric, but they do get the job done.