Fill up on a Tuesday morning. The lines are short, and the diesel is usually the cheapest of the week.
Impulse snack buyers, city-center drivers, and anyone who needs air in their tires (I have yet to find a working air pump at a Makro station).
If you want a specific brand of sports drink, a hot pie, or a gourmet coffee, go elsewhere. The "convenience store" area is minimal. It is mostly bulk snacks (giant chip bags) and basic engine oil. There is no bright, air-conditioned café vibe here. It feels like a warehouse floor with fuel pumps.