They are ALL amazing!
I have tried all of Calming Co's tonics, U Relax, U Sleep, and U Focus, and have been using them for a couple of years now. They are all amazing and work as described. My personal favorite is the U Relax. I am able to make several different mocktails with this and they are always amazing! I prefer Calming Co's tonics over the ready NA drinks available in stores. You really can't go wrong with any of the choices. The only down side is I wish there were more flavors for each tonic. I recommend them all!