I'm no expert by any means but after reading some of these posts i see why gerber isn't used effectively. You never use gerber when a suit is agreed on. Only when no suit is agreed on, a natural NT bid has been made and 4c must be a jump bid. Under these circumstances it works great. What I don't see is control bids and seldom quantitative bids. Blackwood and RKC are often used at the wrong time and cause problems. My opinion.