Our experience was similar to most of the ratings.
The location itself and the communication with the host was great.
However, the apartment building is old, smells and heats up quickly. The shared bathroom was relatively clean.
Our first impression of the room was a wall that was literally falling apart, concrete was laying on the floor, the bedsheets were dirty and the lampshade moulded.
After requesting a refund of the cleaning fee and a visit of the cleaning staff our stay was bearable.
In total the room was big enough for two people and serves its purpose, if you’re just looking for a humble place to stay the night.
I would not recommend it to people looking for a long term accommodation in Boston.