This espresso machine is a true commercial machine w/ a small compact chasis - adaptable to an office, home as well as a small restaurant and pub. In typical Bezzera fashion , this unit is of high quality - using a rotary vane pump, solid Bezerra brew group, full size solenoid and inlet valves and a commercial pressure stat. The frame is of metal and stainless steel construction utilizing a former 1970's retro Bezzera design - this unit is both affordable and stylish. The PM version is a semi automatic espresso machine.