I have trained with one or two national level (or higher)powerlifters. They swear by putting dbol at the end when they are prepping for a competition.
I guess it would depend on your goals. If your a bodybuilder you would put it at the beginning to kickstart the cycle. If you are a powerlifter working up to a contest, a slow build-up isnt a bad thing…..so long as your hitting big weights at the end of the cycle…..when it counts.