My boyfriend and I visited Villa Eleni (apt. 4) in August 2019. Our overall expirience was plesant.
Pros: Very spacious apartment, just a minute away from the beach, clean, good fascilities if you want to cook your own meals, quiet, supermarket was two minutes away, nice garden.
Cons: Apt 4 is situated somewhat in the basement of the building which means low ceiling, small windows and absolutely no direct sunlight. It was very very dark - we used the lamps even in the brightest hours of the day. This created an unpleasant and depressing atmosphere.
The air-conditioning is in the common space which means that you have to sacrifice your privacy, if you want to stay cool in the hot summer months and you are not traveling only with your spouse. We kept our door open all the time to cool the bedroom, but even so the temperature was never as pleasant as in the common area.
We didn't use the TV, but if you like watching TV in bed keep in mind that there is no TV in the bedrooms, only in the common area of the apartment.