I stayed there for 7 nights. Very good hostel, almost perfect: the rooms are clean, have shower, toilet and TV. Linen and breakfast is included. The staff team is very helpfull and friendly. The only downpoints are that there are no lockers you can lock your valuabels and the street noise. There is an internet cafe in about 5 minutes walk which is really cheap (follow Rue du Fg du Temple in Eastern direction).
Well, when I came in at midnight, the rather talkative desk attendent was watching soft porn, and the electricity wasn't working on my floor, but the hostel was filled with plenty of fun characters - many of whom gathered in the tiny lounge area to watch the Euro Cup on the tiny television. The view from the top floor is beautiful, and most of the people I encountered were really nice!