Juicero was beautifully (over)engineered and worked as advertised. They just thought people would be willing to pay exorbitant amounts of money for a machine that can only juice proprietary bags of pre chopped fruit blends from the company. Everything worked exactly like it was supposed to. It was just the actual business model that was ridiculous.
i'm not sure it really worked as advertised, the machine didn't appreciably create more juice than just squeezing the bag yourself by hand, and the bags weren't really "fresh squeezed juice" because it was largely already in a liquid state and only required sqeezing to get the last bit out of the bag.