I bought this expecting a couple nice collars and I got exactly what I expected.
Of course naturally you would try this on yourself before your dog, I did and it was perfect. Not to much of a shock but just enough to feel a slight jolt. (I tried it on my neck) I'm using it on my dachshunds and they are responding well to the training. I have four dachshunds and I'm training the two younger boys Junior and Jasper. I watched a couple shock collar training videos and now my too little dudes don't bark at strangers on walks, they stop barking on command, and they don't drag me when I take them for walks.
I watched the video in the link before I bought my dog collar and I think you should too. It really does help and is a great way to train dogs. Don't forget about positive reinforcement either though!
I would 100% recommend you buy it. It worked for my sweet little guys and I'm sure it would work for yours too!