Having just gone through a move in the midwest, we used realtor.com as the primary search site. Too many times we found Zillow/Trulia information to be inaccurate, either missing listings or just wrong data for bedrooms/sqft.

Realtor.com was very kludgy but it was leaps better than the local MLS website even if well below the UX of Trulia/Zillow

Both the listing agent of my old home and my buying agent in the new state asked for Trulia reviews when the process was over

/1-random-data-point