This is a charming, modern, lovely property in a wonderful location. The apartment is spacious, and has a very well-appointed kitchen (we cook most of our meals when we travel, so this really matters to us). It sits on a pedestrian laneway, so is totally peaceful and quiet. The sea is a 1-minute walk, and town (with a lovely harbor and many tavernas) is a 5-minute walk. Ancient Delphi (the reason for our visit) is 45 minutes away. We had no idea that Galaxidi was so charming!
Helpful advice: this location has windy, narrow, and steep streets. While great for exploring, we arrived after dark and had a tough time finding the apartment. The owner (who was wonderful!) ended up meeting us at the church at the top of the town, and we walked from there. I recommend setting your gps for that church (St Nikolas).
I don't know if Galaxidi has a supermarket, but we shopped in Itea (another sweet seaside town).
This is a wonderful, wonderful place.