That one feature, the Zestimate — a price tag that hovers over the rooftop of every home in America and estimates its worth — is what makes Zillow so irresistible to users. The aspirational ...

Zillow's price estimates are screwing up homebuying — but Americans love them When Zillow debuted in 2006, the fledgling site bore little resemblance to the real-estate behemoth it is now.