The information given about house values -the Zestimate is based on an algorithm and does not take unknown facts into consideration. That is why the information given is false and misleading. Unfortunately, the more a business like this one continues to put itself forward as professionals, genuine professionals are more likely to start using their information as factual - yes including Appraisers. They do have a link where you can go in and correct information, however, that is useless when the company doesn't act on the corrections. This type of business should be more regulated - why are people's homes listed without their permission when they are not for sale? That seems like an invasion of privacy and a burglars dream i. E. photos of rooms for folks who are not even aware they are on the site