For serious home buyers, the MLS is better than Zillow. Zillow is not directly connected to the MLS database, which means that the information on the site may not always be accurate or up-to-date. The MLS, on the other hand, is the primary source of information for real estate agents and provides accurate, real-time data about properties. So, if you're looking for the most accurate and up-to-date information about properties, the MLS is a better option than Zillow.