Great idea and great execution.
I heard about Mill on the podcast Everybody in the Pool and immediately ordered one. They thought of everything: no stink, seamless process for returning food grounds, quiet, energy efficient, everything. Normally I refuse to enter into subscriptions over outright purchases of products, but this is the one case where it makes perfect sense to have the subscription model. Also, the tech support and customer service is excellent. We tell people about it whenever we get a chance.