I came across an online ad claiming that their acne serum could clear up acne in just a week. While I did see improvements, it actually took closer to two weeks for me to notice significant changes. I feel the advertising should be more realistic about the timeframe. On another note, I also tried their breast and v-tightening serums, and I was genuinely impressed with how well they worked. So, despite the initial disappointment with the acne serum's timing, I'm giving them three stars because the products are effective. However, I do think they need to manage expectations a bit better.