Questioning to determine problems.

Ask "What problems have you encountered with the firm you have been using?" Anyone who has been ordering services for a few months or even weeks has encountered problems. After all we're not dealing with machines, but with human beings. If a person puts you off by denying any and all problems, respond by saying: "You're quite fortunate. When I ask most people who order help that question, the usual response runs from poorly skilled to poor attendance, turnover on long term assignments, no shows, etc. Have any of these situations ever happened to you?