The Simple Booster Serum 10% Vitamin C+E+F 30 ML is widely regarded as an effective product, with many users expressing satisfaction and intent to repurchase. It is frequently praised for imparting a glow or brightness to the skin, providing hydration, and leaving the skin feeling soft. Some users also noted improvements in acne, blemishes, or overall skin tone. The serum's texture is often described as lightweight, absorbing quickly, and leaving no sticky or greasy residue. It is also noted to layer well under other skincare products and makeup. many reviewers found the product gentle and suitable for sensitive skin. Its affordability and good value are frequently highlighted. However, a considerable number of users reported that the serum did not produce significant or noticeable differences, with some expressing disappointment regarding its overall effectiveness. While some appreciated the scent or lack thereof, a few found the smell unpleasant. Some feedback mentioned the texture being akin to a moisturiser or sunscreen, or feeling heavy or sticky. There were isolated reports of irritation, breakouts, or allergic reactions. The pipette applicator received mixed feedback, being disliked by some but found easy to use by others. Many users characterised the results as subtle or mild rather than dramatic.