I stayed at Konstantina and Giorgo's place for the whole of June. The apartment is nicely decorated and has everything you need for a comfortable stay. The bed is comfortable, the furniture is quite good overall, and I particularly enjoyed working with my laptop on the balcony.
The location is very good. The neighborhood has everything one needs within walking distance, such as supermarkets, bakeries, cafes, restaurants, dry cleaners, etc. The Evaggelismos metro station is a couple of minutes away on foot, Kolonaki maybe 10 min, Syntagma square 20 min.
Last, Konstantina and Giorgos were a pleasure to interact with. I had a trouble free check in, an equally trouble free check out, and any questions I had during my stay were answered promptly. The hosts are very friendly and very responsive to guests' requests and I would highly recommend them and their apartment for a very pleasant stay in Athens.
Thank you guys!