The way I see it is Zillow always has Zestimate problems. When even they accept that 17% of over 100 million zestimates are more than 25% wrong that is a problem by any measure. It seems to be a regular issue where Zillow have Zestimate problems, and even when they don't admit to problems like they have on this occasion, there is substantial volatility with the Zestimates and Value Ranges that I track in my neighborhood. In regard to my home the Zestimate imposed by Zillow is substantially incorrect and demonstrates Zillows gross incompetence in how it collects and manages huge amounts of data. The fact that they mapped my home in a city 6 miles away and still refused to accept an erroneous valuation illustrates Zillows arrogance in refusing all reasonable requests to correct or delete nonsense Zestimate valuations.