When there is no emergency then it is important that the individual who comes to help you should be trustworthy and qualified enough to handle the job. There are some points which can help you to choose the right expert for the job.
Proximity: only at that time you need immediate locksmith services when you have had a break-in or your lock is broken. So whenever this type of situation occurs then you need someone who can come over and repair or replace your locks.
Qualification: locksmith service can be very complex if the person is not enough qualified to handle the job. Professional and experienced locksmiths will able asses what the problem is without you needing to explain the situation to him.
Trustworthy: if you get in emergency then only experienced and trustworthy locksmith can help you better and in good way.