I have read in the forums about Atlantis Travel Agency and cruises but has anyone used them for tours in and around Athens? Specifically, we are looking for a half day tour of Athens and a full day tour of Delphi. They have pretty reasonable prices but can't find any reviews on the company's tours. Anyone use them before? Do you get what you pay for? Are you on a big bus with a bunch of people? Thanks for any insight you can provide!