Zillow: Friend or Foe?

[Mike Savage]

So we have a 4 br 2.5 ba rental listed on Zillow (Hot Pads/Trulia).  I noticed it's "Zestimate" is $2700/mo. but we've been getting $3345 for the past 6 years.  Today I managed to send in a message to Zillow and will wait to hear back on Monday how they came up with their number.  However it's got me thinking about the risk/reward of their platform.  I wonder if the low Zestimate is turning off our potential candidates.  Any thoughts out there??