Having never been on that site, I don't have an opinion. However, I understand that most of these sites have outdated or incomplete data, which complicates matters. What I can say is that there are multiple sites that are free where a buyer can go to get information. Coldwell Banker has coldwellbanker.com and floridamoves.com - one for a national search and the other strictly in Florida. There is also realtor.com which has every listing - in the millions. If you are searching for something here in the Miami area, I can give you access to ListingBook. This gives you access directly into the MLX, which is the system Realtors use to search for homes. You can change your criteria, widen the search, etc., without having to depend on a Realtor. When the time comes to see the properties, then you get a Realtor involved.
I hope I've been of some help. Please let me know if you're interested in ListingBook and I'll set you up. TX!