The serum has a mild citrusy, slightly sour scent (weird but not unpleasant), and doesn't irritate my sensitive skin. It is lightweight and doesn't cause redness even when used daily. I have used the product for 4 weeks now, and here are my observations.
Pros:
I had hormonal acne around my jawline, and there was significant scarring left over despite not touching/picking my pimples. The pigmentation left untreated took a while to fade, and I found the serum sped up this process. I've also noticed that my skin tone looks more even, and the pores around my forehead are less visible. Really impressed with the results so far.
Cons:
The serum has Sodium Ascorbyl Phosphate which is oxidation-resistant, and I use the serum at night followed with moisturiser. However, I have noticed it has slightly stained my skin - my face is now 0.5-1 shade darker than my neck. Not a complete deal breaker, just something to keep in mind. Would definitely still repurchase.