I will tray to work with the steel muzzle ... I like leather (my opinion) ..
leather muzzle never disappointing me... with the German Muzzle, i never seen a dog take it off (also in the army).
a normal leather muzzle (10-20US$) ... never disappointing me, also, easy take it off, the one problem the dog also some time take it of, and when u work with agressive dog, i don't think u want it off

G.D.K's KID with Dudi's May
there is one thing i don't like in steel muzzle ... when u work in muzzle attack, the object can stick his fingers in the muzzle.
BTW... we talk about leather how are my Dog's collar's (i tape the NAME on it) ?