Good engineering, a simple design that makes this style of machine a breeze to use right out of the box. The tank is easy to clean and it is easy to prepare new solution as you clean. Plastic components, the case, the handle and bucket (etc) are made of thick durable plastic. The motor maintains even power and never sounds as though it is under any strain. The tilt handle make this type of model very handy to run under tables if you rather leave heavy furniture in place while cleaning.