Hi all!  I'm considering trying a bitless bridle - and am wondering a few things!  What are your thoughts on this:  What level of control do they provide?  Is this something to use on a somewhat less experienced horse out on the trail?  Can you use a running martingale with this bridle?  How does it affect head carriage?  I'd love to hear from people who use them ...before I go out and buy one it's great to get opinions from those who've used them!  Thanks all!
H