This location is the best! It has alkaline water too. I usually come here because it has a spout to clean off water bottles. I've been to another location which does not and when you fill up the water, it is on tiles with nothing to drain it on (definitely no bueno).
It also has a 24 hour vending machine outside if you want to use it. It is 5 cents less than buying in store. Inside is nicely decorated, clean, organized, and the service here is impeccable. It's just a great place to buy water from.
I also love the fact they sell Thrifty Ice Cream here and shaved ice. A perfect combo for the summer. It is kind of hidden, but it's on the side of Fry's Marketplace.