At UTMB, in the 1980s, I was taught to do complete physicals on live "simulated" patients, who would review my technique on pelvic exams, for example. I think this "artificial breast" could be very useful, but would recommend that the doctor designing this bring in breast cancer patients pre-op so that students could examine them. I can think of quite a few patients that would in that setting. Those students could then feel the artificial breasts and grade the lump texture for feedback. That might be an even more effective way of developing a correct simulator.