i hate reverses (what most people call double reverses). I don't like slow looping end arounds when a jet sweep could work just as well. I hate when anyone other than the quarterback throws the ball. if an offense had a running back who really knew how to make decisions and make the right pass, i'm ok with it but if you have that guy, it shouldn't be a trick, it should be a regular part of your offense.
when they fail (and when they fail they fail spectacularly), i think they're very demoralizing to your offense.
i don't know where any data is on this, it's just my gut feeling