We Contracted with Nicholas for a 2 1/2 day tour. We were a group of four people and without exception, we all feel that it was the best we possibly could have experienced. Nicholas was extremely knowledgeable of Greek history, mythology, archaeology and was able to answer every question we threw at him. He was fun to travel with, extremely courteous, and was more than generous with his time. If you are looking for an excellent guide to take you through this beautiful city and beyond, Nicholas is your man.