When I click the "start house hunting now" button it directs me straight to a login page, with an error message. Which is annoying because I just wanted to see what the site actually does.
This is what stopped me from using the site. I went through the work to find a url for a house, pasted it into the box that claims "Get started by entering the url for a property you are interested in" and get a login screen. That's not quite what getting started means to me.
Get stopped.
Oh, yeah. Your site not working at all is a known cause of low conversion rates.
Clicking "Start house hunting now" does all that, _and_ breaks the back button functionality on Safari.