Don't expect anything fancy there, this was the cheapest place out there but it had everything we needed while in Athens. We stayed in two different rooms (one has a window, the other doesn't), there was a comfy bed in both of them, a desk and a few chairs ( if you are going in cooler months like we did, I would ask for another blanket and make sure the AC/heater unit functions properly). The bathrooms are shared but were clean since they have someone who comes every day and sanitize them. I even got a hairdryer! We came from the US and would need a serious converter in order to make my hairdryer work in Greece.
The entrance to the building is inside the market place and it's okay during the day but at night you will encounter some shady individuals openly doing drugs. They didn't bother us but can get loud so be warned and careful. Also, this area is full of immigrants from Pakistan, Egypt and Asia. If you like to add a different type of food to your repertoire in addition to Greek one, so here you have it - down the street. By day you can also buy all kind of baked goods, nuts, sweets, coffee, meets, fruits and vegetables right from the market as soon as you leave the building.
Make sure to admire Parphenon visible from the balcony of a shared kitchen and beautifully illuminated at night. The kitchen has a kettle, tea and cifee, a fridge but no stove or a microwave.
All in all, we enjoyed our stay there and wishing you the same!