I occasionally buy bottled water. Not to drink here in the house. I buy it to take places. I do not drink soft drinks, only water so when out will buy it more often. I do get the tap water with ice at restaurants most of the time.
Our tap water is fine for drinking, though we have very hard water. It tastes fine, I'm used to it.
Tap water is much much cheaper and most bottled waters do not have the added fluoride which children who only drink the bottled water have been having teeth issues.
I don't like using all that plastic and all the garbage it creates.
I prefer to drink the water that has gone through the filter of my refrigerator however that is only a fraction of what I drink.