"Yes, Maam, I can to exactly what you want!" says Ager as he smiles. He is so agreeable and has such a pleasant personality that you don't even bother to check his credentials or the quality of his work. You assume that because he speaks so well and seems to listen to what you want that he must be a qualified professional. However, the quality of his workmanship can vary quite a bit.
Here are a couple things to remember. Always check the quality of his work. Look at a job that he is doing, or look at pictures of his work.
Secondly, if you have any special instructions that you tell him, make sure he writes it on his Work Order or Contract. Remember, if it is not in writing, it didn't happen (legally speaking). If you told him something specific, rememer, he has many other jobs on his mind. Don't expect him to remember it unless it is in writing.