>>211773676 (OP)I most often go to Coop (no relation to the UK store), since it’s the closest to my house, but I actually prefer Migros for some stuff (they’ve got a better bakery). These are the two ubiquitou domestic supermarket chains in this country.
But for fresh produce I prefer Turkish corner shops—much smaller selection, but fresher and often better quality.
For cat food, Denner (slightly scummy local discount chain, owned by Migros), because it’s often on sale.
For non-food items (cleaning products), I cross the border and shop in Germany sometimes, where toilet cleaner might be a 60% discount.