After posting my previous review, one of the owners promptly contacted me and apologized for my less than perfect experience. It was because of this review that he personally investigated the problem. It turned out to be an equipment failure. They had the problem fixed and invited me to have another soda on Fiiz. I came back the following week and ordered the exact same thing. The waiter upgraded it one size as well. This soda was a huge improvement over what I got the first time.
I think this is the hallmark of customer service when a business takes your bad experience and makes it right. For this reason I am listing Fiiz in my "Best Customer Service" list.