We stayed 5 days in Barcelona at Xalar. The flat is very clean and the room is big (+AC in the room), the location is perfect and allowed us to visit without having to take the bus or metro (and we visited a lot)
Furthermore Xalar is a great host, he made us feel at home, offered us coffee & excellent smoothies :) and even allowed us to use the washing machine
We highly recommend the flat to anyone wishing to travel to Barcelona