Been using it on our shire x but today was the first time he tried to pull away whilst wearing it AND for the first time he couldn't get away. Very pleased as this has been one of our biggest issues with him.
I loved mine for Puzzle too-when she was being generally bolshy with some rearing thrown in it was good I don't use it all the time now but I still use it if I think she's going to be naughty/I need some extra control.
The only problem I found with them was the sizing-Puz is in a full sized headcollar normally, extra full/parts are full bridle, but she's in a 'large mule' be nice!!
Good for when you need them mine is sitting ready to be used this morning as someone is getting bolshy.
One yard I was on had a working student who was a thief, I was peed off when my Bnice was taken. However police recovered it along with her other pickings