Carolina is a nice and very flexible host. The communication was good!
There is a big lock to close your bedroom from the inside (we felt safe at night), the bed is comfortable and the AC works. There's a bus stop nearby which is quite convenient because walking all the way to the pretty parts of town can take a long time (only 15min if you take the bus).
The flat is in a big building (surrounded by other big residential buildings) so the neighbourhood is quite noisy. The buildings and flat seemed a bit old and we could hear cars and street noise from the bedroom (windows closed) and also the upstairs neighbours. If you need silence to sleep or if you're a light sleeper, I highly recommend taking earplugs with you.
We only spent a night in Carolina's flat (she doesn't live here, she rents the other rooms) and it is convenient, it does the job and it's a good private room for price we paid. I would recommend it for a short stay (1 or 2 nights).
If you're looking for a cosy airbnb in a nice part of town, look again, if you're just looking for a place to sleep, then this place is fine.