The best referral I have given was to Liz Bankston. My sister's in-laws were visiting and mentioned they were considering moving to Atlanta. I asked them if they had started looking at houses and they said yes. I said, Well I am not sure if you are talking to a Realtor yet but you have to Liz. Shes fabulous, has a ton of experience, and even runs her own Brokerage. 

Turns out they were already talking to another Realtor, but that didnt matter. After speaking with Liz, they agreed she would be the best candidate to find their next home. 

In less then 2 years, they have bought two houses and sold one with Liz!