May through Sept is almost 90% accuracy for homes that are half as nice as this will be when done.

I am not sure if there is a boundary for rental accuracy.

Realtor dot com is better for accuracy, but they all are products and sell to agents.

We just ran a batch last week, and of the fifty skip-traces requested, 40 came back with emails.I can't speak yet to the accuracy of these data, of course, but this is definitely a great start!

I don't care if he's the cheapest; honesty and accuracy are essential to our craft.

@April RodgersAre you looking to prepare the return and have an accountant/CPA glance over the return to review it for accuracy?

First how do you define "Best"; price, speed accuracy, % successful searches?

SOME guidance...they may not be able to provide with absolute accuracy what the value will be but some type of help should be expected.  

They are much more of a problem than they are an asset.As we commonly tell clients, the "A" in Zillow stands for accuracy.  

Gauging the accuracy of your income numbers is another great reason to talk to a property manager, but if you're planning on living in one of the units then your income estimates line up with what I'm seeing on Rentometer:One other risk to call out is the after-repair value.