Mayak is definitely a good chain of stores with good prices. Almost everything is cheaper than in other networks. Even related products such as soap, napkins, toilet paper, batteries, household chemicals are not more expensive than in specialty stores. You can safely take it. The staff is polite.
So-so. As a rule, fruits and vegetables are of very low quality. For the rest of the positions, more or less. The assortment is small, but you can buy almost everything you need in everyday life, but without frills)))