Consider how busy they are. If you have locked yourself out of your car or house, choose among providers with a practical response time. If you need them to unlock your car, get to know whether they respond immediately irrespective of where you are. In case you need normal services such as installation of locks and maintenance, you should ensure that they are available to start the work as soon as possible. Most importantly, they should be able to complete it in a timely manner. Avoid providers that outsource behind clients’ backs.