Hands down, one of the best hostels! The rooms are very clean. Part of what makes this a great accomodation is the fact that the guests are also respectful of each other's privacy and peace especially in the shared rooms.
Location wise, it is quite far from Charles De Gaulle aiport and also far from the usual tourists attractions but don't let this prevent you from booking this room as Paris has a really good public transport system. You can get to those tourist spots very easily as the hostel is about a 3 minute walk from two metro stations.
It's also great that the hostel has a nearby supermarket where you can get food as well as restautarants. There's a flea market as well and a wine and cheese shop perfect for buying gifts.
Being a hostel, most amenities (except for your bed) are shared. I met a few amazing friends here.
Will definitely book this place again if and when I visit Paris. :)