When I first started bow hunting a couple of seasons ago, after reading all of the pros and cons, I opted not to select mechanicals in my overall set-up for this very reason.
One more possible thing to go wrong. IMHO, I figured that I would have enough variables to keep things interesting.
I've been using Muzzy's the past two seasons and have had good success. This year I will be using NAP Pro fixed broadheads in my set-up. I also use Carbon Express graphites (Eliminators-5" helical offset fletchings)
I know that there are hunters that swear by mechanicals and tout that they fly just like their fieldpoints- blah, blah, blah but I'll stick with my fixed head arrows thank you very much!