I used to drink 1 liter or more club soda most days for several years. At some point I cut back considerably (at most .25 liter in a day), and just drank plain water most of the time. Anecdotally, I felt much more refreshed throughout the day. Comparing how I feel now to then, the soda would have a temporary feeling of being very refreshing, but I would feel thirsty much sooner than drinking plain water.