Myself and a friend loved our stay with WeFlating! It was very reasonably priced, especially as it sleeps 4.
We arrived at around 1pm and expected to drop our bags off and come back for check in at 3pm - however our room was already ready for us and we were given keys straight away.
The apartment is beautifully decorated with plenty of room/storage and also has a kitchenette if you want to cook.
The location is great, it took around 10 minutes once we got off the bus and we found that we barely needed to use the metro - we were within walking distance of all the shops, as well as the Sagrada Familia.
There were plenty of restaurants and supermarkets nearby to choose from and we barely heard any noise from the street at night.
I plan to go to Barcelona with my husband in the future and will definitely be booking WeFlating again!