I stayed for a month and found this to be an excellent base from which to explore Athens. A short walk to Megaro Moussikis metro station and 2-3 subway stops from the heart of Athens (or a 25 minute walk). The location is close enough to the centre but the neighbourhood is quiet and you're right at the foot of Lycabettus hill which is a beautiful area to walk in nature.
The apartment has a good dedicated workspace and the use of space is very clever- you get a lot out of such a small space!
The nearest self-service launderette is a little far away but there's a laundry collection service that you can use.
There's supermarkets and restaurants in walking distance. Overall, definitely recommend for 1 person or a couple wanting to explore Athens who prefer a quieter vibe, or if like me you're working remotely and need somewhere quiet with a good desk.