It common for ANY new acne treatment to cause a breakout when first starting, it usually goes away within a couple of weeks, just stick with it and you'll be fine. Some people have massive break outs after quitting but I never did. As for growing dependent on it, the ingredients are really no different than what's in regular drug store brands, salicylic acid and benzyol peroxide. But they also contain higher quality inactive ingredients which once stopped and you go back to something cheaper might be a little shock to the skin, eventually that should go away (again, never happened to me).
If you want to try it I suggest buying it at the mall instead of mail order since you won't be on their autoship program and you can buy whenever you need instead of whenever they ship. It's the same price, even though it doesn't appear that way it is. I asked a sales associate once and that's what she told me (with mail order you have to consider shipping and you're still paying taxes either way). Plus you get the freebies EVERY time instead of just the first.