When it said you can track other beverages, like Coke, Coffee, Tea, I assumed it meant you could tag the beverage and it would use some kind of formula to increase the amount of water in my goal for the day to make up for the dehydration factor from the other beverages. That isn't what it does.
In lieu of the above, it also doesn't allow the user to track more than glasses (so the glass could be water, coke, etc., but there's no way to track which it was).
It also doesn't track how big the glass is -- for instance, is it an 8 ounce glass or a 32 ounce bottle. That would be helpful.
If all you want is a basic tracker of how many glasses you drink in a day, however, it's an easy to use app.