I'm gonna have to agree with what seems to be the majority here and say "NO" to the shock collars. I'm not doubting that it works...if someone were shocking me, I'd stop too! It just seems unneccessary when there are other, less harmful ways to achieve your goal.
At the same time, looking back over the posts here...it seems like you have already made up your mind and ordered the collar? Why then, if you are already set and waiting for the product, did you even bother to ask for opinions? Especially if you knew they would incite controversy?