Eirini's place is very clean and well equipped - we found everything we needed from all kitchen appliances (coffee machine, kettle, toastie maker) over (beach-) towels to portable speaker and tv set up.
Tinos is a lovely authentic greek island with nice beach clubs and good hikes. The restaurants close to Eirini's place are very good as well and I also recommend Chryssa, the masseuse recommended by Eirini (contact details provided in the flat).
During our stay it was quite windy on the island so that is something to keep in mind. Lastly, the house is located in proximity of the street like a lot of builds on the island due to the hilly landscape - this means you are able to hear some cars from time to time; I recommend to fire up the provided speaker with your favourite music and you will be able to ignore this fact.
All in all we loved our stay and would definitely recommend!