Zam Zam , the name itself proves its purity. I am not a reguler customer there, but sometimes when I go to trivandrum city, I prefer zam zam for filling your belly.
The food items are tasty, to know the quality of the food of zamzam , you have to taste it atleast one time or you have to watch the long queue outside ,
I prefer zamzam , if you are going out with your soulmate , friends or family. Go guys and enjoy the taste of zamzam