W/guidance, the Pinch collar can be your salvation (it sure was ours!).
1) It must fit correctly. Meaning it must be snug so's not to fall down around the dog's chest, but not too snug that it pinches 100% of the time.
2) It must be worn UP around the ears. Also, be careful putting it on and taking it off. Use the same ring every time (mark it w/a piece of electical tape) so that it becomes easier. And I would not use the breakaway pinch collars, as they tend to, well, breakaway, even when you don't want them to.
3) Never, ever, ever, ever, ever, ever, ever, ever, ever, ever, ever, ever, ever, ever, ever, ever, ever, ever, ever, ever, ever, ever, ever, ever use a Pinch collar w/out you or someone responsible on the other end of the leash.
4) THE LEASH/LIVE RING MUST BE KEPT LOOSE INBETWEEN CORRECTIONS.
5) Pincher collar is a goodcop/badcop training tool, meaning the collar is badcop, You MUST be goodcop. When teaching, be sure to PRAISE the good stuff while the collar corrects the bad stuff!
6) Unlike a G/L or Halti, Pinch can be used to teach more than heel. In fact, it's pretty good at helping you teach the auto-sit, down, etc. etc.
BUT!!!!!!
7) A Pinch collar isn't a way of life. When your dog has learned what you wanted him to learn, graduate back to a buckle collar (maybe a choke chain first, THEN to a buckle) and retire the pinch to the bottom of your training bag.
Alhough it may look like a midevil torture device, it is not. And although your dog may yelp when it corrects, he's not being hurt. It gains their attention 100%. It's then up to you what you do w/that attention...
Good luck! ;D