If you want the experience of immersing in an authentic Athenian neighborhood, Koukaki is a great option. It is safe for solo travelers and Kostas’ place is very quiet and the bed is comfortable. However, I had to shorten my stay at Kostas place because there were too many issues and he didn’t really offer any solutions, just excuses. The coffee maker had moldy coffee grains. The kettle had leftover water. The shower hook is broken so you can only use the hand shower head. The hairdryer didn’t work. The towels provided were damp. I would have tolerated all of these since I just needed a place to sleep and privacy but the a/c (heat) was problematic so I didn’t get any sleep on my third night. Kostas doesn’t turn on the radiators shown on the photos. Instead there is an a/c in the bedroom for heat but it keeps shutting off in the middle of the night - on one of the unusually coldest weeks in Athens. There is a comforter but it smelled so bad (like sweaty shirts) I couldn’t use it. Kostas wanted me to use the space heater (ok, a solution) but I explained to him that it’s dangerous to use space heaters while you’re sleeping. It’s a fire hazard. I had no choice but to move out the next morning.