Not bad. A couple of things worth noting, however. Noise is definitely an issue here; the property is located on the corner of two busy streets so there is a ton of street noise. That being said, however, the room is equipped with two large sliding doors that can be shut with bit of effort (they don't slide very well and you really have to pull to get them to shut.) Closing them is a MUST if you want to sleep. The walls are also incredibly thin, so if there is anyone staying next to you, you will definitely hear them. Another weird thing we found was that even when the main light was turned off in the room, it flickered about every 10 seconds which was a nuisance after a while.
The proximity to plaza catalunya is excellent, so if you are looking for somrwhere just to crash for the night after a long day of touring the city, this place will do. Just don't expect a lot.