The store is small, so you should not expect an incredible breadth of assortment here. It's okay to buy something small.
There may be queues of students at lunch, but since people mostly buy a couple of goods, they won't have to wait long.
A small shop, in order to buy something for small things, there are plenty of other shops nearby with a much larger assortment, but here the main plus is that it works from 7.00!!! And the rest from 9.00, before work, go buy something the most.