I bought a sporn anti pull harness at a show yesterday. I saw immediate results and was amazed by it. It puts pressure around their rib cage if they pull. I would only use it in a crowded area although I did try it today on our regular walk and let her off her lead with no problems. She's a SBT. I can't praise it enough, it turned a stressful day (yesterday) into a fantastic one. All for under £10 lol.

I should add that I haven't tried the other ones mentioned.

I use a Mekuti balance harness for my collie. It is fab. He is not really a puller but is reactive to dogs so I attach a double ended lead to the front and back and not only does it give me more control but he remains calmer than on a collar and lead.

We use a halti harness for our dobermann. She is a strong puller and walks nicely by attaching a lead to the ring on her chest. She is not a particular large dobermann and a medium fits her.