The energy content is 268 kcal per 100 ml. Really low in calories, the prepared beverage is thus only when used sparingly. The manufacturer has a ratio of 1: 7 recommended. I prepare the drinks each the glass to and am far too lazy for it to seek the kitchen scale or measuring cup every time. I mix by feel; I like to like it sweet, the mixing ratio is probably a little tighter than the manufacturer's recommendation for me. All four varieties are typically very sweet syrup, but do not taste artificial.
Lime:
The so prepared beverage tastes ok, but is rather uninteresting 'reminds me too much of 08/15-lemonade. Mixed a plain yogurt I find the syrup quite ok.
Rhubarb:
Smells and tastes strange. Can you drink, but (for me) tasted no highlight. From this variety a significantly smaller portion would have enough to try. If it does not taste really, 500 ml are still pretty much '
Cassis & elderflower:
My favorites in the quartet: aromatic, sweet and fruity and slightly tart 'delicious and nachkaufenswert (Cassis) (Cassis is already depleted). I can also imagine both varieties well with sparkling wine as a cocktail (Kir, Hugo).