Excellent place, it's unique and it has a souls of it's own. Calm, beautiful, clean, good services, great staff, kung fu classes and other different cultural/artistic exchanges where you can meet the other guests.
Poitive: Great staff, simple but nice breakfast, nice location, good wifi, lots of young people and great private room. Negative: Booked a tour to sleep with a nomadic family in a Ger and ended up sleeping in a regular house with a family from Kazakhstan. Very nice people, but not what i payed for. Also the guide spoke poor english, what compromised the experience.
There is no 24h reception, one shower only and no common area. The hostel is quite small and didn`t seem to be "THE" place to meet other travellers as it says in lonely planet guide book for trans-siberian railway. Location is good, staff speaks good english, hot shower works fine.