As an employee of a large commercial property maintenance company, I have used the services of Martin Place Locksmiths for several years (including key cutting, mailbox and cabinet keys to code, and general lock supply / installation / maintenance). During this time, I have found them to provide fairly cheap prices while maintaining a professional standard of work, and their members of staff have a friendly and helpful attitude. Best of all, their shop is right in the centre of the Sydney CBD, so it has been quick and easy to organise any work that needs to be done. I would strongly recommend them for commercial locksmith services in Sydney.