Very nice experience
The Hipstel is located in the center of Barcelona, 10-15 minutes walking to Placa Catalunya from where you can get a bus to the airport, metro, train, or buses to all the other corners of Barcelona. It has nice friendly employees and it is clean.
On the negative side, they mixed my booking and I had to move from one room to another, and in the actual; room there was another girl who moved in 2 other rooms before ending up in the right room. And also the bed was the nosiest bed i have ever slept in. It was creaking even when I was only touching it.
All in all it is a great place to stay!
Stayed November 2014, traveled solo