The apartment itself is very clean and well stocked. Katia provided breakfast items, some water and wine.
The pictures are a bit misleading. You can see the sea but the apartment isn't directly on the water, it is set back with a big dirt road in front.
The location isn't in Oia either even though description says it is. It is in Baxedes beach which is a 5 min drive away or 40 min uphill walk to Oia. In the summer season, there is only a bus to Fira from the apartment. The bus to Oia doesn't go past the apartment as it is on a one way route. The host may tell you otherwise but we waited the first day for an hr and none went past.
I wouldn't recommend people to stay here if they are relying on buses like we were. If you stay here, rent a car.
The area also is prone to electricity and water power cuts (something we didn't experience when we stayed elsewhere on the island). We weren't in the apartment much but experienced 3 power cuts. One of which was in the middle of the night and the emergency light that came on kept us up for over an hr.