Recall and responding to voice commands reliably are absolutes with me. I was talking with a dog trainer who advocated clicker training. The idiot had no answer when I asked what she'd do if her dog was running toward traffic and she didn't have a clicker.
I teach all dogs the command " Stop"...which is to be taken literally...whatever you are doing, wherever you are going etc. needs to stop immediately.It has saved the life of every dog I've ever owned .