I have used them and I recommend them. Give them a call anyway - they were able to move us a bit quicker than originally scheduled because they had a cancellation.
I heard about them from people at the marina in Atlanta where our boat was living when we bought it. Some of those people were repeat customers, moving their boat from Atlanta to the Atlantic coast for an annual trip to the Bahamas, and then back.
We had our boat moved from Atlanta to Decatur. We had a very good experience with them. Some thoughts about that in my blog -
here.