they really work a lot better than the halti's. we always have a problem because axle is in between sizes, and it either rubs his eyes or slips off too easy. this is so adjustable, you can even adjust how big the part that goes around the mouth compared to the piece that goes around his neck. i've already used it, and it works out sooooooooooo much better! and so much sturdier and not so muzzle looking. also, with the halti's the connector for the leash is under the mouth, this one is more centered between his nose and the back of his jaw. also, with the halti's i don't like the LITTLE thin strap that connects it to the collar. with this one i feel safe enough that i don't need to connect it to the collar. with the halti's i always just connect a choker to the loop i connect the leash at, but it makes him look "dangerous." if the halti comes off, i know it means trouble, but with this one i don't even feel a need because it's so stable! axle can't even get it off himself, because of how adjustable it is, i can actually get it to fit JUST right! i love it! sorry for the length, but i just love it so much and it really works great!