Filippo's listing matches the description - it's walkable and conveniently located for public transit.
It's also quite spacious for what looks like a student accommodation or nursing dorm. Note that the building does have a bit of an "institutional" feel, with linoleum floors and heavy metal doors to access the stairwell (Filippo's apartment is only one floor above street level).
Some guests have commented on the "narrow stairs" to the loft... They're more like a built in ladder - almost vertical. It takes some getting used to but is probably okay for most guests without mobility issues.
The bathroom is an interior room under the loft, and has no windows or extractor. It can get musty if you leave the door closed after showering, but is much better if you leave the door open along with an open window in the living room to bring in fresh air.
Overall a decent place with some real compromises. Filippo obviously cares about being a great host.