The Rocket Appartamento, with its HX Heat Exchanger E61 Espresso Machine and copper construction, offers superior features from Rocket Espresso Company's production line in a compact size. It includes an E61 grouphead, steam pressure gauge, and Heat Exchanger boiler, enabling concurrent coffee brewing and milk steaming. For extra brewing precision, an optional E61 Grouphead Thermometer is available. As of 2020, the Appartamento has a Campini commercial-grade pressure-stat for enhanced temperature accuracy and steadiness. It also features a low water level indicator and a conveniently positioned water tank with its own lid.