Micklem Rambo Multibridle - who used it? Is it as good as they say?

I have been riding (and training) my Orlov Trotter bitless for a few years now. I used side-pull and cooks bridles however recently I came across Micklem Rambo Multibridle. It is supposed to be the only multibridle (you can use it with bit, without or as cavesson) that is gentle on your horses face due to it being designed around horse's head's anatomy. Has anyone here used one as a bitless bridle? What do you think? I am tempted to try it but it is not cheap so was wondering if I could get some feedback from fellow bitless riders