Mosaikon is a fine modern hotel, centrally located. Only a few blocks from the Monastiraiki Metro Station, which goes to and from the airport. It is impeccably maintained, and the staff is very helpful, competent, and congenial. I stayed nine days, and was able to see Athens (the sites, the restaurants, the rebetiko) as well as take day trips with no trouble at all. Athens is a busy place, so you’ll do well to avail yourself of their breakfasts, which is offered buffet style with your type of coffee: American, cappuccino, or Greek.