It's a great place to stay, sparkling clean!
Excellent location; you are next to a lovely bar and many other good places to eat (i.e., Bel Ray is within 5 min walking distance).
Excellent communication: I had a late check-in and needed to call the host to ensure it was the right door, so there was no problem with communication (near midnight).
The wifi was a bit slow, but for me, it was enough. If you are not for work in Athens, this is sufficient bandwidth.
PS. There was even a bottle of water in the fridge upon arrival, which was nice.