Besides sketches and renderings it is crucial for a designer to have "real" models to judge the ergonomics, haptics and function of his work. The earlier in the design phase, such quick models are built, the better. Unfortunately only big companies can afford to have a designated model shop.
ModelMachine is trying to fill this void for the smaller offices and startups. With a footprint not bigger than a office desk ModelMachine offers everything one could ask for in a model shop.