Zillow is the most useful RE site out there at the moment. Like all other new technologies, it has its flaws. But with more time and more data, it’ll get better. No new technologies/website come out perfect from day 1. Add Zillow with ZipRealty for MLS info and you have a very useful duo. I challenge you to find another site that provide sales history and map w/ info like Zillow that’s easy to navigate.