Nothing to complain about.
The host answered all our questions and helped us to find what we need. Also there wasn't any problem with coming back late. Location is really good, centre 20min by foot. Many bars and coffee shops in the surrounding streets.
The room is small as stated, but it was really enough for us (2 young people who just wanted to be in Barcelona for a few days). In the kitchen you'll find all important things. War super.