Location, very near to the red square and metro!
Service, excellent service from the people at the desk, the kitchen and cleaning services, i would say this has been the highlight of the hotel, i arrived late at night and they were able to acomodate for the breakfast next morning, also gave good and honest advice about Moscow.
Price, for the location and the quality of the room i think it's a very good deal
I read comments about a club next door but i only saw a normal restaurant, it was very quiet and was able to rest during the night.
Nothing i can think of, only minor thing is there isnt an elevator to the reception, so u need to go one floor upstairs, but is not a big deal as the stairs are spacious and not steep.