I'll put this first before I get into full review because I know people (like me) only read the first line : BOOK THIS PLACE.
Christos' mariner home in fourkouvoni is, simply put, incredible. At this point in our trip we have visited other islands and looking back we wished we had spent all 10 days at Christos' house. You don't feel like a tourist, you feel like you are part of the community and they are happy to have you there.
The home is comfortable and quaint, with all the necessities to help you get situated - fresh eggs, olive oil, water, beer, etc. The outdoor shower and beach are incredible.
Things to note: you will need to rent a car. The drive seems a bit harrowing on the first time through, but you get used to it and appreciate it. Milos is best seen by car, so you'll want to be able to drive around to the beaches and villages anyways.
Christos is the best host we've encountered. He met us at the dock, set up a rental car, and was constantly available for recommendations for food/music (go to where he says... really...the food is incredible). We also got a chance to meet his mom and that only added to the whole experience.
All in all, this was the highlight of our Greece trip and would love to return some day. Thank you Christos!!