Fantastic hostel, excellent location 30 min walk from the Eiffel Tower (or 15 min metro and a metro station right out front, 20 minutes to the Lourve.
As a solo female traveller I felt very safe in the area and the hostel was very clean. Very comfy bed. Privacy curtain, plugs, your own light. Two showers. The lockers are quite small so not big enough for a big bag but you can hang a few things in there and put your valuables in there. I had no issues with this.
Plenty of supermarkets and cafes around too.
Great stay overall would recommend!