gentle leader?

I had several people suggest the gentle leader so I loooked at their website and through some posts on here. I was mainly interested because Gunner chokes himself sometimes when on the leash and it also said it helps with jumping and greeting and helps scared dogs gain confidence. So I was thinking this could be beneficial in several ways, confidence for submissive wetting, my dominance to help with bitting/ attacking, and the jumping while greeting. He is not a real big puller he only pulls when he goes off smelling a trail but otherwise he's pretty good about walking with me when I call him. Any opinions on using it with my lab/hound puppy?

I have only used it once at the shelter that I volenteer at and I think it didn't work that good.