I had a beautiful experence! The apartment was clean, big enough and with a kitchen with all the equipment needed.. Moreover, the view on IST marina and the sea from the balcony is really amazing!! And still more important, there is the a security in the hall before going up to the room who is checking who is coming at every hours!
The owner of the apartment was super available for solving any possible problems or check-in / check out.
In conclusion: safe, clean and beautiful!