Camgur and Gustavo's is great. It's located in a very central spot amongst the night life of Barcelona, and relatively close proximity to the beaches too (walking distance).
The rooms were very large and each had an ensuite, making it ideal for groups of travellers. We didn't use the kitchen, but it seemed well sized and stocked with basic utensils.
The noise from the 2 street facing rooms can be a bit loud at night, so closing the wooden shutters on the door is needed for a quiet night of sleep. There are 2 other rooms facing an internal opening / space shared by the building, which a more quiet in the evening.
There is a lift to transport your bags up to the room which helps with any mobility issues.