The store is within walking distance with a decent assortment, but do not forget that it is in the very center of Yerevan, a stone's throw from Republic Square. Therefore, the prices may surprise you.
I recommend checking the honesty of sellers.I asked to weigh two cucumbers and one tomato, they brought it from the back room, the cucumbers were in a bag, and one tomato was suddenly in a solid substrate. I opened it at home, and there was a tomato with a huge crack in the middle. Also, a regular grocery shopping trip for 1 person cost 12,000 drams. Perhaps they also cheated.