This is a cosy little place in a less touristy part of town, but with lots to do both nearby and a short walk/bus/tube away. Eli and Agus were friendly and quick to respond, and happy to meet us at a slightly different check-in time due to delayed flights.
The location would especially suit if you're interested in exploring the area west of the old town, like El Raval, San Antonie and Poble Sec; this is the slightly more urban and edgier part of town, but has loads of new bars, shops and restaurants. However, it's also close to a very quick metro line to either the port/beach, La Rambla, Gràcia or Park Güell – we found it really easy to explore further afield.
The flat has lots of rooms (includes a walk-in wardrobe) but does still feel on the small side. Persoanlly, I'd recommend it for a couple sharing the main bedroom, which is lovely – though my brother and I managed fine using both bedrooms (I drew the short straw for the small second bedroom, but at least the bed was comfy). The building was also very quiet during our stay.
Thanks Eli and Agus!