I first saw one of these key duplicators at a local lowes and was intrigued. I did not use it myself as I was not about to pay money for a competitor to cut keys especially a machine. Although I can certainly see the appeal and this machine is not really competition to us as we stock over twenty thousand keys. BUT, we quickly learned of a danger from these machines. Within a short period of times employees were copying their company “Do Not Duplicate” keys. Is seems the machines do not care about that and there is no way for the machine to check. So, we have had to rekey businesses and put in locks that use keys the Minutekey cannot duplicate. Oh, fun. FYI for all you business people with DND keys.