I bought a Beer Machine from the US second hand because I want a small keg to fit into our fridge. So I actually brew using the typical 30l fermenter, then transfer to the Beer Machine to use a a dispenser. However the stupid thing doesn't seal all that well - it's basically a plastic 'keg' cut in half horizontally, with a pressure relief valve to let out CO2 from the brewing process, and a tap to pour out beer.
It seems that some people love these devices, others think they're a waste of time. Pedro - I can take digital photos of it for you if you wish. I can also sell it to you if you want it......