The place is running so old business model but is still very effective in today's world full of competition. You can witness too many satisfied consumers.
It's a very unusual place: there are a lot of people, and the main "dish" is just sausages served with squash caviar, boiled eggs and bread. Sometimes a cat walks indoors. I had it once at lunchtime, and of course it would be better to have a shurpa, lagman or pilaf, but not sausages. In general, try it.