My fiancee (now husband) and I used Gate 1 for the Athens, Mykonos and Santorini trip. Everything was so good, that we have used Gate 1 for 3 trips since (Spain, Israel and Japan). . All 4 times we have had a great time.
vnb: Did you go on Plan A, B, or C? Also, did you find their optional excursions worthy of the price/time spent? Please add any advice you have about the Athens, Mykonos and Santorini package. Thanks!