OMG! This bit is awesome. I don't use one but two of my friends do and they love them. They arent as harsh as they look but they do have some "umph" to them. Both of them have big, heavy on the forehand horses that are extremely difficult to slow down/ get them to listen up on cross country.
Some people believe that these bits are "harsh" and that if you trained your horse well enough than you have no business using one. I disagree. My TB LOVES LOVES LOVES to take off with me on xc even though he is slow as a snail in stadium. ( so if this is your case then I would continue using it) and I've tried numerous bits to try and get him to come back to me. And when he takes off, he throws his shoulders around and is hard to steer. Dangerous combination and of course no one believed me except my mom/friend (who has a similar problem and uses the sweet six) now I use an elevator bit with double reins and I finally have control!. I don't believe he takes off from bad training, he just needs a harsher bit. Every horse is different and if this bit works for you then go for it as long as you are gentle with his mouth. Depending on your horse you may or may not need it. If he is fast and high strong, then go for it or use and elevator as a less harsh way....but if the lady was just using it to get him to "back off " the bit to get his head down, then don't use it, that's just reverse training. Sorry for ranting so much! I tend to get off topic :P