We had a great time in Barcelona and at Anna's place. The room is small but absolutely sufficient to have a good time. The space is clean, with comfortable beds and AC.
The place is super central and very close to metro station. So wherever you might want to go, not is easy to go there.
The communication with Anna is easy and super prompt. She is super nice and tries to make you stay as comfortable as possible. When we asked for some adjustments and had some changes regarding our arrival time, she was super open and willing to work around our schedule. I can absolutely recommend staying at Anna's.