All in all a good and cheap accommodation.
We spend four nights here and visited Seville over a weekend. The staff was very kind and always helpful.
The rooms are getting cleaned every day and everything is nice and tidy.
We spend our time in a 8-bed room. The other guest weren't a problem at all, but that's always luck and something you cannot rate. Nevertheless it can be a problem when some people can't sleep while the AC is turned on and others while the windows are opened, because the street below is rather busy with horses riding all day and night and a restaurant.
Next time I would spend the extra money on a two bed room.
If you're used to sleep with noise the hostel is the perfect choice because it's a 1 minute walk to the cathedral and gives no other reasons for criticism.