Stayed at Villa Eleni with my wife + 2 young daughters. Read on for detail if you wish, but my review does not include even minor recommendations. This place is incredible.
Location = 5 stars!
10 min. drive from the Temple of Poseidon at Sounio. 10-15 min. walk from main village (main square, 2 bakeries, 4-5 restaurants, an espresso bar, butcher, kids' playground, church, etc). Bonus - only a 20-30 min. walk (or a 1.5 min. drive) from either of 2 nearby beaches (our favourite was Xapaka/Haraka). Other bonus - no stray dogs!
House + layout = 5 stars!
This house could easily be in a magazine. Huge, well-equipped kitchen, all appliances/clothes washing machine are German (Miele). House is very roomy, well-designed open layout, multiple large patios with excellent views for dining/sitting/relaxing. Thick marble flooring + very well constructed bedrooms means footsteps won't wake sleeping children, etc. Even the floor drains are marble! Everything in this house is meticulously thought-out and well-designed - including the massive pool and backyard landscaping.
Connectivity + entertainment = 5 stars!
Internet connection is strong & fast. Dozens of Greek and international satellite channels available. Lots of electrical outlets for charging devices. Huge microfibre couches for napping/tv watching/reading/entertaining/etc.
Night time safety = 5 stars!
First of all, we never felt unsafe for one second walking around at night or in to the village. Everybody is friendly, no stray dogs were spotted (a rarity in Greece these days), and it's so peaceful at night, you can literally hear the ferry boats' engines churning as they pass by your patios. But any village that is primarily full during summer weekends is bound to have some bad things happen now and again. As mentioned above, everything has been thought out extremely well. Huge automatic gate provides a secured entrance to the property, which is surrounded by a very solid wall/fence combo. Windows seem to be double-thickness, and are bolstered by metal shutters that raise and lower with the turn of a switch. The front door is basically a bank vault door, you can even see who's knocking with a video screen right beside the door handle!
The owners = 10 stars!
Emails/phone call are answered promptly, everyone is super friendly and made sure to let us know they were available for questions any time. They were so nice to my family, I wanted to invite them to have dinner with us - at their own house!