I went the whole way just for the place in Petrivka. the buffet is set a bit off Moskovskji prospect but could be found , they have signs painted on the path! the buffet is at the first floor and is quite small, they have wooden tables and almost no window has a real view (and the view would be on the highway anyways). the vegan choices are displayed on the menu above the counter as in a fast food chain, V is for vegan dishes, they had 2 desserts which were vegan , one is called Himalaya mountain and consists of a base made of a cookie covered with orange marmalade and prunes and on top a mountain of whipped soy cream and nuts on top! delicious! One girl of the stuff could speak english. I've found no wi-fi.
really good and definitely cheap!