ORIGINAL: *JB*
How about the fact that they are loud. Pulling the arrow through them is way to loud in my opinion. That, coupled with the speed loss and the bulkiness is the reason I chose to get rid of mine. I believe that if a person would go to a dropaway they would never think about using a WB again.
None of mine have been loud, but then again, it has to be setup correctly. Since hunting with one on my bow, I've drawn back on approximately 40 deer and not one has reacted in any way to my draw. Most of these were inside 15 yards.
As for the dropaway rests, you couldn't pay me to hunt with one. Moving parts, and cords to get caught on branches - way too many possibilities for failure for me to put one on my bow. I'm hauling my bow up trees in the dark, while hunting thick undergrowth. The chances of those things getting hung up is pretty darn high in my situation.
I once put a Muzzy dropaway on my bow. I think it doubled the bow weight. I took it off without even shooting an arrow. Every rest has it's negatives. For me, as a hunter, the WB has the least. Most of the perceived problems are operator error or a need for a slightly different setup. Anyone who chooses to get rid of a rest because it costs them 3 fps, is making a decision I can't even comprehend.