Beware the ZOMBIE THREAD!!!
I make Kombucha all the time. The secret is to drink it before it ferments too far. When it is at it's prime, it's kind of a pear tasting sweet fizzy drink. But let it go longer and it gets drier and more vinegary. So, it's up to you to taste it and "pull" when you like it.
Put it in the fridge to stop the process, and drink it chilled from there.