I can fully recommend this apartment. It was clean, comfortable, spacious and had all the necessities for a city stay. We especially liked the neighbourhood which was central and well-connected without being too busy and had cool shops (especially Re-read, the great second hand bookstore) and a good vibe.
There were very handy shops and cafes close by and a nearby stop for an open-topped bus tour.
The host Cesc was helpful and very easy to communicate with, responding superquickly to any query. We accessed the flat via a key safe which was easy and convenient.
The street is quiet and mainly residential.
No negatives at all.