This is an amazing place to stay in Oia without doubt. Originally Marcos Rooms were all booked, I was still be able to contact with Panos and he offered us an underground cell( which "upgraded" to a normal room due to some misunderstanding between my friend who checked in 4 hours before I arrived). We got the better room which is 20 euros more expensive without knowing it, Panos's parents realized the mistake later but did not charge my friend for the extra money. I am grateful for their understanding.
About the place, it is very close to best place/platform to take sunset picture of Santorini. If you are coming to Santorini, this place is the best. The terrace has a view of the sea on the east side of the island and the church nearby. I love Terrace in general haha:)
the room is clean, Panos parents kindly offered me orange juice after I had the 4 hour hiking in Santorini. Bathroom is clean and has warm water, unlink what others's description. I think they improved it. Pano's parents called taxi to airport for me for 30 Euros. I enjoyed myself a lot. Will definitely book again and go to Santorini again.