Fantastic value.
Pros:
Loukia was very communicative and accommodating, and answered my questions at all hours of the day on Whatsapp. Amenities are correct, and include a washer/detergent (ask for instructions!) and a small balcony with a built-in drying rack if you're staying for longer than a week. The room itself is extremely clean and well cared for, with extra trash bags, cleaning supplies, body wash and shampoo in the shower, extra towels and bedding, and even a disposable toothbrush if you forget yours! There're also two snacks in the fridge, a reusable water glass, and coffee pods to get you going. Honestly, with the microwave, toaster oven, extra dishware, and a stove top with a kitchen hood, you could probably live here for quite a while. There's a small elevator in the lobby as well, making it easy to move around.
Cons:
The location /is/ a bit sketchy; Metaxourgeio and Omonia are considered somewhat dangerous at night by locals, but I was able to walk back to the flat from the metro multiple times during the evenings without incident; the metro is only two blocks down! Like any big city, consider your surroundings. Only street parking is available.
The walls are pretty thin. While the neighborhood is very quiet most hours, you'll definitely hear people coming up and down the stairs, conversations near the balcony, and your neighbors. It's not uncommon to hear loud clanging from the front of the complex around 3 or 4 am.
The shower has a small ledge to prevent flooding but will often seep water, regardless. The drain slides open and close, so keep it open if you don't want water to overflow into the bathroom, although there's another drain under the sink for that specific purpose. It's also a bit oddly shaped; you'll feel a bit cramped no matter what direction you're facing. Careful with the bathroom sink facet: turn on the water slowly, it comes out fast!
Other than that, extremely comfortable for a short stay, within walking distance to just about anything in the city, and close to public transit.