I was very excited to try this one out, I got it from a buy at Sephora in France. Erborian is a Korean-French brand, and this particular serum is supposed to be regenerative. It had a funny consistency to apply, a bit sticky, discreet scent, but I can not say that I saw an effect. It was unfortunately too small to say anything conclusive about it. You would have to try this for longer time to see its effects, or request a couple of samples before deciding to buy it. And for such products it is always hard to judge its effects.
Would I buy it based on the sample? Not really, but maybe you find it interesting or have tried it and can tell me more about it!