This place is AMAZING! The food and service were spectacular, and the ambiance was unreal (we dined in the library). Out of everything we ate, the sprout salad was the most remarkable and the one item I'd highly recommend (everything else was also very good though).
As a side note, the place is very foreigner friendly, they catered to us splendidly :)
Food was amazing, incredibly unique menu and Moscow dining experience, amazing wait staff, super polite with a coat service in their basement. Food here is expensive and comes in small portions but it is so good and worthy it. You can ride the elevator up to the library floor and get an enhanced experience if you wear nice dress shoes and dress up nicely.
Didn't eat so don't know what's the food is like... But when we came it was overcrowded, the table we were given was too big for our group, and was right in the way. It felt like a last minute addition for the crowd as all the waiters kept on bumping into it. Very dim place, overdone decor, cant even see the menu. The items were weird (some traditional Russian cuisine from the 18th century with weird names? It was weird for me and I'm russian). We just sat there and nobody came up to us. We left because it was too much. HOWEVER it might be an OK place on a slower day.