Much of the Greek charter fleet is based in the area mostly at Alimos marina (Kalamaki)
Flights to and from Athens are numerous and good value. Getting to the departure marina is easy and quick.
Enormous selection of charter yachts
Two attractive itineraries for a one week cruise
You must cross shipping channel at start and finish (tiresome)
Crowded with other charterers less competent than you!
They are 6 night/7 day itineraries that with thought can be combined into 14 day cruises. If you have that long, consider the Southern Itinerary and continue south down the quieter East Coast of the Peloponnese.
It is only safe to berth here in calm weather (infrequent in the Cyclades in summer).Also wash particularly from the Blue Star ferries is a major hasard. You will be greeted by the harbour master on his bicycle to whom you pay the modest berthing fee. Avoid the seafront restaurants - one block in there are plenty of wonderfully attractive places to spend a pleasant and relaxed evening. Shopping for provisions and other things is probably the best in the Cyclades. It is off the beaten track for mass tourism.