We stayed only 1 night at Krystallias's place.
The apartment is really a good one, clean, central, everything in order. Check-in was smooth and timely. We however had one little unexpected surprise that they did not have 3 bedrooms as was listed (which I see now has been corrected after our escalation to Airbnb) and was the main reason why had booked this particular apartment.
Other than this, the apartment is well worth the money. Nothing to complain.