I too have listen to the podcast and have tried this in the past and present (with very little luck) I do not have the strenth to stand like a tree when she does pull with just a collar.I have no control So I still use the halti with a loose leash and she walks great no pulling, stops on a dime and does not usally go after other dogs, squirrels (just people). she is allowed to pee or pooh when I give her permission when we are walking.. When I use Elizabeths methods I am pulled left right and center, maybe I am not doing it right I don't know, but I am not allowed to have my dog off leash where we live. so IMO if I have more control when she is on the halti I will have to contue to use it.
Have a heart that never hardens, and a temper that never tires, and a touch that never hurts."