Stayed at Studio Katerina last August for 7 nights, the rooms are recently renovated and are in a great shape although the corridors leading to room may give you the wrong impression that its old as the owner is still working on the renovation.
The rooms are not too spacious but have everything including kitchen with a fridge, etc. The toilets are of a good size and very modern which is very important when you are staying for a long time.
There is a beach just across the street from the rooms at one of the beach bars, you can also find restaurants and supermarkets at a walking distance.
The owners are super friendly and make you feel at home and like family from the moment you meet them. we had a misunderstanding with the booking ( our fault ) and the owner was extremely nice and friendly about it, definitely a reason to consider staying there the next time we are in Nikiana.