We have rented an Emerald Island pool home from this site, although our stay is not until next month. I have had several dealings with the owner which have been extremely positive, and have corresponded directly with a previous renter who had a great experience.
I have also haunted the discussion boards over there for about 6 months and I feel that the owners take real pride in their homes -- these are their dream vacation homes, which they spend a lot of time in, not just an investment -- and they are very decent people. A few months ago, someone posted that he was stuck ina dirty rental home (NOT from that website, from another site) and people on orlandovillas.com actually let him and his family stay for free in one of their homes -- they had it all arranged within a few hours and saved the family's whole vacation.
I'll be sure to post a trip report when we return in early March!