Isaac's apartment is lovely and my husband and I really enjoyed our stay there. It has a really calm and relaxing vibe, beautifully but simply decorated. After long days exploring the city it was great to come back to somewhere so chilled. Before staying here I'd seen some other reviews saying the apartment can be a bit cold, as the underfloor heating is only in the lounge/kitchen area, and its best to leave the bedroom door open at night as a result. So we did this and thought the apartment temperature was fine, we stayed in February and didn't feel cold in the apartment at all. Location-wise it's great, lots of bars and restaurants nearby and close enough to walk to Las Ramblas & La Sagrada Familia without being in the thick of touristy areas. There is a bar downstairs next door to the apartment but we couldn't hear it from the apartment so don't let that put you off. We slept amazingly well on a super comfy bed every night! Isaac was a great host, unfortunately he wasn't able to do the check-in in person which was a shame, but his lovely friend Rosa was there to meet me. Isaac was really communicative before & during our stay, with prompt and helpful replies, and gave us lots of recommendations for our stay and helped us find parking near the apartment. I would recommend staying here and if I ever get the chance to go back to Barcelona I will definitely be checking that Isaac's is available!