At the time of choosing exterminator in Arizona make sure the one dealing with your home is an expert in his job. You need to enquire about his qualification and experience as a technician. You can also be curious enough to know if the company provides personal training to them as well and the credentials on the basis of which they are appointed and can be trusted enough to deliver a good job.
The next step is to find out their working procedure. Ask them if they will inspect and consult you or provide you with a written report and if it will be also be charged or just the treatment will cost. Observe if the company has done a thorough inspection of your home before they submit a written estimate and their proposal on the treatment required. It is always better to get the estimates in writing as it makes it easier to compare notes with other company as well before zeroing in the pest control in Phoenix. The best way to find out the status of the company is through contacting few references enquiring about their opinion on the company and talking to few family and friends who have undergone such work. They will be experienced enough to guide you get the right pest control company.