I had a nice stay in Anna's studio. The room and bathroom are clean and relatively quiet considering the central location. It is located in a nice and lively neighbourhood and has good accessibility with the metro station nearby. Anna was also super friendly and easy to communicate with.
The main downside is that the room is very small. I was on my own in a double bed studio and I still felt it was a bit cramped. I needed to work as well and there was not really a desk I could use so I had to sit on the bed all the time. The beds are also quite short, if you are longer than 1m85 you won't fit in them.
Overall I had expected a little bit more for the price though maybe that's impossible at such a central location in Barcelona.