Though not being able to get to know Nikos in person, he sent some good advices of places to go and where to eat. In general the place was good but it would need some very small and cheap adjustments (like the stove that didn't work properly) and I would suggest that microwave would be very welcome.
I had read in other comments that the place is a little bit noisy in the mornings and in fact it really is because of other things in the surrounding area.
Anyway, if I were to go to Athens again I could stay there. So, thanks Nikos.