It has good prices but if you doesn't know how to speak good Armenian and tried to ask the worker where i can find this and that they probably going to ignore you because they won't put effort to understand exactly waht are you looking for
As for Yerevan in terms of cleanliness, it depends on the branch. My least favorite is the one opposite to the old KFC (now closed). The Mega Mall branch tops my list. It is clean, big, almost everything you need you can find there. The staff from the butchery section tends to be moody and even would shout at the customers 😔