Question about lead generation program - please advise!

I have a property out of state, and have locally heard about a lead referral program called TenantStream. The idea looks really sound, but I am relatively new to renting property and thought i’d find out if anyone had heard anything about this company, or if the idea itself was good/bad. The website for the company is:

Drop me an e-mail or reply here with any comments. Thanks in advance for any advice!