Very much overpriced for the quality offered. It used to be much better before. Just to give an idea, a bottle of mineral water (price 15 pesos at any kiosk is charged 70 pesos here - > USD 3,50). The burgers are nowhere near what they once were (burger and cheese - nothing else - costs about USD 6). You'll eat better at McDonald's for the same price where you can get a relatively decent combo for USD 10 (which includes more than cheese on the burger, fries and a soft drink).
Takeout food costs the same as eating in the shop... go figure.