Has anyone had success with no-pull harnesses and if so, which ones? I am currently using the Sensation with my 18-wk-old pup. But it also doesn't work real well in high-impulse areas--Tanner walks pretty nicely around the block with it, but once we go into trails in the woods or near water, it's right back to severe pulling. So while I'm trying to take him out places to meet people, use up some excess energy (in addition to off-leash at home), we don't get very far if it's strictly a "training" walk. As soon as there's the least bit of slack, he's off to pulling again. I've tried just stopping, changing directions, and that's fine...for 2 seconds. So the "walk" is pretty frustrating for both of us at this point.
I'll keep using it if there's nothing better, but it's pretty pricey since I will probably need to go thru 3 sizes before he's an adult. At puppy K, the trainer recommended a prong (that's all they use) but I'm not real comfortable using it...my goal is to be able to transition from the harness to buckle collar at some point. The dogs at the training center (obedience titled adult dogs) are still using their prong collars. Our trainer did admit that the no-pull harness did "seem to be working for him."
Any thoughts, either with training methods or equipment? I hate to admit it, but I've never successfully trained a dog to walk well on a loose leash

. This is probably the best I've ever gotten, but I'm nowhere close to my goal.