Hiring a Carpet Cleaning Service

How long have you been in business?
What training have you had in cleaning carpets?
Are you a member of any trade organizations?
Which method of cleaning do you recommend?
What type of equipment do you use to clean carpet?
How often should I get my carpets cleaned?
What is included in your quote?
You want to be sure that the quote included moving the furniture before and after the cleaning. Are steps included? What other charges could arise?
Do you guarantee your work?