My strawberry cordial worked well even with half the sugar, and like you cookie, I still find it sweet. I often drink the plain mineral water but sometimes like to fancy it up a bit or make a cocktail. The syrups aren't TERRIBLE since they market them as a healthier option to regular soft drinks (no high fructose corn syrup, no aspertame) but I feel better making it myself and knowing exactly what went into it.
Now, if only I could figure out how to make tonic for a G&T!