The apartment is situated a bit further from centre but that is fine since you have plenty of options to get to city centre and it's close to Tibidabo so it's worth visiting that one too.
Pedro was nice and showed us in as well as allowed us to do both late check in and check out without any charge. We very much appreciated this since both our arrival and departure flights were late at night.
The flat is cosy and clean. Well equipped with all that's needed for a short or long stay.
I would definitely recommend this place and the host.