I made a batch of tonic water syrup a couple of years ago and, though it was a success, there were a couple of things I found slightly off-putting in the result. Specifically:
Some people from work invited me to the Dominion Tavern a week or two ago. I was persuaded to try the gin and tonic, as I was told that the tonic water was homemade.
I ordered one. The drink that came was orange in colour and looked vaguely like tang. In other words, it did not look like a gin and tonic. It tasted, however, unmistakeably like a gin and tonic - a rather good gin and tonic at that, and this comes from a guy who's not particularly enthusiastic about gin and tonics.