Location is excellent. It is a 5 min walk from Plaza Catalunya, which is where the airport drop off/pick up is located. Extremely convenient if you're planning on using public transport to some of the further tourist attractions. It is within easy walking distance to most of the major inner city sights of Barcelona.
Check in was easy. Apartment is on the 3rd floor, serviced by a tiny lift. It only fits 2 slim people. Something to consider if you're a party of 3 or have a pram.
The pictures do not match the apartment. The furnishing was different and minimalist in comparison. Bed is soft and slightly lumpy, so be aware if you need a firm bed or have back issues. I slept ok but my partner didn't.
It is located on a busy street so expect some noise at night. There are buses and cars at night on the main street. People go out for dinner late in Barcelona (10pm is quite normal) so it can be quite lively. If you want an early quiet night sleep, you will have to bring ear plugs. It wasn't a major issue for us as we embraced the Barcelona lifestyle and had a few late nights.
The host was attentive and great at communication. He gave us a great list of tips on Barcelona. We tried one of his restaurant recommendations (Casa Alfonzo) and it was one of the best places. Go there early in your stay!
Overall, I would recommend this place if you're a couple who value being very central and don't mind a bit of street noise.