I am training my horse and she responds VERY well in a bit-less bridle. The only problem is that this rope version doesn't last. The weaving that connects the rings gave out after about 30 uses.
I am using this bridle on two newly broke mares 6&8 years old. One is a arab/app and the other is a saddlebred/paint. It fits both of them great and they respond to it wonderfully. I do not use bits on any of my horses and this works alot better than clipon reins on a halter. I am buying more of the same.