Get the Mikmar DVD and learn more about them!
I purchased a Fox Trotter who was very comfortable in a Mikmar Combo. My initial reaction was they looked bulky, and more like a torture device than a bit. I would NEVER use one. Then I decided to educate myself a little and ordered the Mikmar DVD which explains how their bits work. I learned that they were specifically designed to do less damage to a horse's mouth than traditional bits (in the hands of a novice, or heavy handed rider.) I am not good at paraphrasing so won't even try; but the DVD made a lot of sense. Suffice it to say, I ordered a Mikmar Featherlite Combo and love it. It works off nose pressure FIRST, then bit, chin and poll. It is surprisingly lightweight. My horse is very happy in it. My trainer and I have used both a snaffle and the Mikmar and he is just fine in both. We are sticking with the Featherlite Combo. And I ignore the people who think it looks weird, because they haven't done their homework.
Hope that helps you a bit!!! Good pun eh?!