I tried the 'positive' way with my Staffy and her pulling on the lead. Finally put a check chain on her,one check, and she no longer pulls
and you can say please and be as nice as you can to my bull terrier, but he dont give a rats about what you want him to to!
I got pulled up for placing my dog into a sit by a delta trainer... i walked out of class and never went back
I also believe in E collars, and think they are great things, if you are a delta trainer.. dont even think about looking at using one!
I would never do a course with anyone that made you do it their way - i like to be able to think for myslef and know all options that are out there - doesnt mean i will use them, but they are there if i need to