Experience with AirDNA? Where to start?

[Eva Meyer]

Does anybody have experience using AirDNA? One of my friends told me about this site and it seems promising. It looks like users would subscribe/pay for the markets that they are interested in researching. My problem is, I wouldn't know where (in the country) to start since I'm undecided on which state or city I'm interested in investing in.

Any tips or advice on this online tool?

Thanks in advance!