We now use this E-meter for several years and are completely satisfied with it. It is processed very handy, light and yet solid. The blades can be plugged simply eject at your fingertips and easy to clean. The device itself is not actually dirty when used, due to its rounded surface may be there but quite easily wipe. For us an E-meter is not a substitute saws, therefore we do not try to make Frozen bone or to saw. Ingeniously, it is to clean dissecting dishes with pastry, such as strudel or Kassler in the puff pastry. So get so even purchase an E-meter, if you need it only rarely and when the film "In the Realm of the Senses" knows and thus is about traumatized ...