A month ago Star Tribune columnist John Ewoldt wrote a column comparing Zerorez and GreenClean carpet cleaning companies. Reader Sue sent an email saying that she had recently gotten estimates from both companies.

GreenClean made a trip to her house to quote her a price. The person doing the bidding doesn't have the carpet cleaning truck running, just waiting for the customer to give the OK and start cleaning. He schedules an appointment for a later date, assuming the customer requests it.

Zerorez, on the other hand, asks questions by phone. A phone quote is given, although Sue described the price as "vague." Sue received a quote, and then several days later Zerorez showed up at her door ready to clean. Sue thought that Zerorez was only there to finalize the phone quote, not do the cleaning.She described the experience as a "horror story."From the Minneapolis Star Tribune.