I also use a fallaway for hunting because they are easy to tune out contact with small diameter shafts and helical but they are easy to get more containment withso the arrow doesn't fall off the rest or bounce on the shelf when drawing.
That pretty much sums it up for me too why I've become a fan of fallaways and saves me the typing. I used to shoot a straight offset to obtain fletching clearance, but after putting a Muzzy Zero Effect -- and now Limbdrivers on my newer bows -- I bought a helical clamp for my Bitz and put as hard a helical as I can on my shafts and still get contact on both ends of the bases.