Acids like BHA, AHA en PHA must be formulated at the proper pH in order to be effective. The effective pH of PHA is 3.8, for AHA it's 3.5, for BHA it's 3. The pH of this toner is 5.5 which neutralises all the acids in this toner. Also it is unclear what the percentage of BHA, AHA, PHA and niacin is in this toner, this is very important information to determine if they can be effective. Ingredients like Tea Tree Oil, eucalyptus and peppermint are irritants for the skin.
So overall I don't think this toner is any good.
PROS: It purges the acne and then heal them to reduce them, minimizes the pores and smoothens the skin. One bottle goes a long way too. I thought it will not last for 30 days but so far I've only used probably around 60%.
CONS: It is kinda drying, makes your skin a little red, and depends on your skin condition you may need more than 30 days.
FULL REVIEW: http://stylevanity.com/2018/09/some-by-mi-miracle-toner-review.html