I got that from LAB, Queensway, Admiralty. As part of my AM/PM routine skin care, I use it after applying fresh's Creme Ancienne INFUSION, then followed by fresh's soy face cream. In terms of hydration, I personally don't think it work well on "continue" but instant hydration. But I like its strong cucumber smell. While both soy face cream and soy face serum contain amino acids, I doubt the effectiveness of this key element.
For the firming effect, I feel nothing about it.
In summary, the packaging, texture, and smell of this product is great but it may not successfully solve one's thirsty skin.