As am member, I have experienced the worst costumer service by Derek Marbles. This man has been extremely rude not only to me, but other members of the gym.
He clearly seems to be on a power trip given the fact that he was a big time college ball player and is now the GM at a crappy gym. I actually feel sorry for this man.
In addition to all of this, I have seen him having people he trains use the most dangerous forms and weights that are too heavy while they work out. DO NOT USE THIS GUY!!!