Vouliagmeni is full of trendy little cafes/restaurants. Many feature more of a nuveau style cuisine which is usually served in a pretentious setting and at a premium price.
My wife and I decided to follow the recommendations of others who have reviewed Zaxos and chose this restaurant for dinner.
We were very happy that we did and can confirm that the consistent comments about the excellent traditional Greek food, relaxed and comfortable setting, friendly service and a very reasonable price are all true.
If you expect high cuisine this may not be the place for you. I would not; however, characterize this as a burger or sandwich cafe. They offered specials as well as standard menu items. Have a look at the pictures we took at the restaurant and decide for yourself!