^^I dont like this one. It seems to me like the horse has to hurt his mouth with every stride.
^^ Gogue is good in my opinion if it is used on well trained horse used to a solid leatcher chambon (not the gummous one!)
I like chambon very much, even though i dont lounge, if i had, i would definitely use chambon and when the horse gets the balance, switch to gogue.
I dont really like side reins as they are to much rigid imho. If this kind of tieing, im for triangle side reins (sorry i dunno the name in english). Like this
But it's different with every horse. As i hate gummous stretchy chambon, i used it for one mare as she was very good on it. She was rigid, stiff and so quick on free, side reins, tie-downs etc.... But shen I got her stretchy chambon between legs(girth)>>mouth>>sides of saddle, she paced peacefully, her head strethced down, and freely. She's comfortable when the rein contact is stretchy (she has very dull mouth but she likes the feeling she has the support of it).