The A-CICA365 SOOTHING RELIEF SERUM pH4.5 by AESTURA has received positive feedback for its effectiveness in managing oiliness, particularly in the T-zone. Users with combination dehydrated skin have noted that the serum helps in controlling oil production without causing irritation. However, some users have mentioned that it might feel a bit heavy during summer or when applied in larger amounts. It's recommended to use it in combination with a moisturizing cream to balance the hydration and oil control.

For those with oily skin, it's advised to apply the serum lightly and possibly layer it with other products to enhance its effects. The lightweight, fluid consistency of the serum allows for easy application and quick absorption, making it suitable for daily use. Despite its benefits, some users have pointed out the higher price point as a drawback, suggesting that sales or discounts would make it more accessible.

Overall, the serum is praised for its ability to soothe the skin, reduce redness, and manage oiliness, especially in the T-zone. Its gentle, non-irritating formula makes it a good option for sensitive skin types as well.