Oltian’s apartments are fantastic for a short stay in Athens. Though small, it had a really well equipped kitchen, good air conditioning, it was quiet and clean. Oltian was very helpful with answering any questions via message. The apartments are located in a great location if you want to visit the archeological sites. Many of the main attractions in Athens are within walking distance, and the Monastiraki metro station is about a 10 minute walk away.
For the more cautious traveller: the apartments are not far from a cluster of Brothels in the Metaxourgio area. However, these can be avoided easily once you know (via Google) which streets to avoid. For myself, (26, British, Female), I did not feel unsafe, but I think it is important to be able to make that decision for yourself.