Price : I bought it on sale for 15€ on Yesstyle but it is usually sold for 20€ (bottle contains 30ml). I have used it everyday twice a day and the bottle lasted for around 10 weeks. 20€ is not cheap but I don't think it is overpriced as it is a Tranexamic acid serum.
Texture : It contains hyaluronic acid and so the texture is the typical hyaluronic acid texture, so it's not a watery serum, it's a bit thick but well absorbed by the skin. I personally don't like hyaluronic acid so I didn't enjoy that much using it and that's why I wouldn't rebuy it but it was efficient on my sun spots.
Efficiency : this tranexamic serum worked well on my sun spots (PIH) but I didn't notice any improvements on my red acne marks (PIE) after 10 weeks of trial.
Comparison : For around the same price range I have tried the Inkey List Tranexamic acid serum but I have found that this one works better.
PAO shorter than average : 8 months. It was not a problem for me since I don't open too many serums at once and finish them quite quickly.
Peeling : common problem with hyaluronic acid is that it can peel. I usually applied this serum and then my sunscreen (Skin1004 hyalu cica or La Roche Posay uvmune fluid) and at the end of the day it was peeling a little bit.
