This is not a forum for disgruntled homeowners, its an investment site. Microsoft has flaws with every release of Windows program, Toyota has flaws with their car models and Zillow has flaws with its zestimate. This is nothing new with big or small companies in every sector.
The key is how can they monetize on the users. This is a media company not a real estate company. With 30% EBIDTA by 2016 (according to CEO) the company will be making $3+ EPS and that's all that matters.