I only stayed there for 3 days and it was totally worth it! It's not a party hostel, so if you're into parties and all that, you better look for another place.
It's good located, about 20 minutes walking until National Mall, only 1,5 block from the subway and near to supermarkets and restaurants.
Staff is nice and always trying to help you and asking if everything is ok.
The only 3 bad things:
-it's not open 24/7 so you can get in trouble waiting for them to open at 8 am
-they don't give towels, you have to rent it
-you have only 1 bathroom to everybody, so there's a lot of wait sometimes
But, overall, it's a great place to stay in. More