I didn't get any fizz on my first batch (my flavours weren't sugary enough to lead to fermentation), but it tasted great!
I made 3 big bottles with different flavours: ginger, lemon and ginger, and coffee. Coffee was amazing, if anyone is keen to try it (just poured about half a cup of cold coffee in the bottle and topped up with 'booch.
Gardnermer, I'm so sad for your mouldy batch