We used Legend Ephesus (www.legendephesus.com) for our shore excursion in Kusadasi last March. They did really good job.
The tour was divided in two parts, Ephesus and Terrace Houses first, our tour guide took us on a wonderful historical experience... and in the afternoon, Sirince Village was wonderful for our shore excursion in Kusadasi. Also, We had an excellent tour guide who showed us many parts of Ephesus that we would not have discovered on our own. She gave a full, historical explanation of Ephesus and the way of life for Ephesians. The visit of Sirince village was equally enjoyable and informative.