To be honest, I never believe in products like this - I have always been a toothpaste person when it came to zits.
Fortunately, I do not suffer from acne, however, I do suffer from the occasional zit and/or cyst. This product has been a god send. Does it work miracles? As close to a miracle as possible. It is $30, but aside from its efficacy, it lasts forever. You won't need to repurchase for at least a year.
I would highly recommending giving this a try. If it doesn't work out for you, you can always rely on Birchbox's amazing return possibly.