I have been using Mad Rock shoes for the last few months, and have found them to be a good shoe and have some excellent features including an superb thin coating of sticky rubber on the outer which comes in handy far more than you would have thought, and also some teeth injection moulded onto the heel cup which work exceedingly well. The only new feature I have heard any complaints about is the hooking rim on the sole which does look unusual from a traditionalist/slab climbers point of view. I have found no major problems on edges (which the are wicked on) or slabs although I would not say Iam the best person to put them to the test on hard slabs. I guess time will tell, all in all a good new shoe with and excellent fit!
Greg