We enjoyed our stay at Mirella's place! The location is great, close to metro/supermarkets/pharmacies/restaurants... 15 mins walk to Sagrada Familia, you can even go as far as the beach if you like walking.
There are a lot of equipments in the appartement, coffee machine, kettle, microwave, toaster, everything but an oven. Everything was clean, and working well.
We travelled with our 2-yo son. When we arrived the cot was ready. He liked sleep there. The description says there are some toys/books for children, but there wasn't any. Not a problem as we brought ours. Maybe it is only on demand.
The building is old, but pretty quiet, even if the last night of our stay we were woke up by people making noise in the apartment below. The neighborhood is safe.
In brief, a good value for money.