We had the Zillow API on our company website for awhile. Zillow and Real Living were "strategic partners" until last December.
I would say 10% to 15% of my listing clients are aware of Zillow prior to my explaining what Zillow is and why we use it to market our listings.
Help-U-Sell North High Realty
Managing Partner / Realtor / MBA
I had a FSBO contact me today and I thought I would check out Zillow on him and he had claimed his property. The Zestimate is $190,000, he is asking $240,000. He is closer to being right then the Zilly price.