It can be hard for weak people to walk upstairs to 4th floor, but it's not a problem to me.. oh, btw about smoking, I'm non-smoker and it was not good whenever the main door was opened, cause the smoke flowed in. (I think in Russia, smoking is not regarded as bad as in Korea..)
But, So friendly, and funny. Actually it was the first time for me to stay in youthhostel, so I can't compare here to others. But, there was so comfortable. staying in the center of the Moscow at that price, it's nice.
It's very close to kitai-gorod metro station, and not very but still close to citi-bank atm. about 5 minutes walk.