First of all, I rated this rental 5 stars by its type.
It is obviously not a 5 star luxury stay, but for what it is, price, location and description all is top notch accurate.
Please note, that the address provided is doubled in Athens, so make sure that you take the one near FIX metro station.
It is a very simple rental. Perfect for short term stop, it is a great alternative for a hostel, especially if you are a couple.
It is very street noisy, and the old building has an approximate insonorisation, so earplugs will be a great help.
Also, If Marios adds an extra electric connection it will be easier to charge electronic devices.
If you fancy a comfortable shower, make sure you turn the boiler on 30min prior to it.
Overall, clean and decent stay.
I liked to have the opportunity to discover the honest picture of simple Athenian living.
Marios is very fast to reply if anything.
I totally recommend this listing for budget travel. If renovated up to day, the apartment may become a luxurious stay, but will lose its authentic charm.