Works perfectly. Those who complain are most likely inexperienced, using too little water and too much pressure. It takes time. I place my machine on a tripod drill press and apply some pressure to it, but basically just let the weight of the machine do the work. I have a ring around it (which I made out of clay) and hold a few ounces of water in it. Alternatively, you can use a spray bottle filled with water. No soaking needed - just keep moist.