Not even close. The traffic that the site you mentioned gets less than 1/100th of the traffic that Trulia.com, Zillow.com, and Realtor.com see.
I'm placing my listings on more than 50 Internet search engines including the three mentioned above. FSBO.com will provide an internet presence, but won't get anything like the exposure that the main stream sites will provide. I can send you a comparission chart which shows the relative traffic if you like, just send me an e mail and I'll be happy to send it over.... more