Tesco raises a challenge with its discount store Jack’s

The new discount supermarket stores Jack’s introduced by Tesco are apparently proving their efficiency comparing to the other retailers.
According to the interview of Birmingham live with Tesco boss Dave Lewis who claimed that Jack’s is the cheapest in town , and indeed the same agency made a small comparison of some essential products and slight differences were shown .
These stores are expected to be challenged by the other Supermarket retailers , on the other hand quality matters too .