I don't know, I haven't been there, but from the outside it was clear that people often go even on Sunday when it's closed, people often forget or I don't know, but the visit is huge, probably it's very tasty and cheap or just delicious, I can't say more precisely
The best place where you can have a cheap and delicious lunch. The interior is clean and tidy. The staff is polite, they understand Russian. Perhaps the only disadvantage is that it does not work on weekends.