Visited with a friend for Primavera Sound 2022 (weekend 2), arriving a day early to do as much Barcelona stuff as we could before the festival kicked off.
The location is amazing, short distance to excellent bars, restaurants (Cerveceria Catalana ⭐⭐⭐⭐⭐), and other amenities. Mercadona is two-floor supermarket with all you need to tide you over for snacks, and the communal kitchen looked like being easy to cook in (though we didn't use it).
Communication with Hip Karma was straightforward and pleasant, and staff were very welcoming on arrival. Easy to find and helpful directions from airport in advance.
The building within which HK is situated is gorgeous, and well preserved.
Great value, and various room options would suit several types of BCN holiday/long weekend.