If you are old, bigger size or travel with the princess just avoid this hostel :) The rooms are really small, some of them without the window. In the room there is place only for a bed, no place for luggage or even place to move. BUT if you need the room on the reasonable prize - this is perfect place to stay (in Moscow average prize for the room in 3 stars Hotel is around 60-80 Euro!!!). Location 10-15min from Red Square by foot. Metro station 5-10min (Kitay Gorod). Next to the hostel is tiny Monastery canteen - for 6-8 Euro you can enjoy real Russian food.
The rooms in the hostel are clean, furnished with stuff from Ikea. The staff are very friendly and English speaking :) Check-in 24h.There is a small kitchen when you can prepare the food for you (fridge, furnace, dishes, washing and drying machine). Two bathrooms with shower and toilet inside, additional two separate toilets. The cleanness? Depend from the people that used it :) Generally for us it was ok cheap, perfect location - better couldn't have in Moscow.