I learned a long time ago that proper use of a 'prong collar' is a very effective way to teach a dog to heal, sit, laydown, recall, etc. I learned how to train with a prong collar many years ago working with a professional gun dog trainer. Any collar that constricts on a dog, thus choking him/her requires a great deal of pressure to work as a training aid. Prong collars, when used properly only require a quick 'pop' that gives the dog a sound with pressure ('pinches the skin' as the prongs are smooth so they will not stick the dog). An added bonus to using any collar to train, is it makes the transition to an e-collar faster, as the dog already knows that pressure on the neck means you are doing the learned command wrong.
The problems with the older style prong collars is that the latch is difficult to use and are notorious for coming off, and the prongs in circle the collar, thus pinching the skin around the throat of the dog. The new one I started using (When my professional dog trainer showed them to me) a few years ago, does not have prongs around the neck area and has no latch. It simply slips over the dogs head and adjusts to the dogs neck when hooked to a lead. You can see these at http://www.lolalimited.net
...they call them Secret Powers Training Collar. Check them out!