I used that product a few years ago and I actually did like it! Which surprised me because I normally don't like products with SA. I do think this product helped to fade marks but it takes time still. If you do decide to use it, using a sunscreen will also be important as it increases your sensitivity to the sun. And I've heard sunscreen / SPF is important to not make hyperpigmentation worse.

The only reason I stopped using it was that I wanted to try something different and I decided that for my acne, spot treatments just aren't effective enough. But I would use it again for hyperpigmentation.