Zillow

[SossMan]

Zillow is pretty good for large condo complexes and newer developments and in somewhat stable markets. Not so good in neighborhoods with few sales, differing ages/conditions, and areas where building restrictions negate some of the benefit of larger lot sizes.

Basically, you have to remember that zillow can't see inside your house. It also cannot distinguish between inter-neighborhood characteristics, and things like curb appeal. That's why it's good for newer homes and condos since there aren't usually major differences between neighborhood location, interior appeal, curb appeal, additions, remodels, etc...