I give the Hydragenist Serum by Lierac 4/5 thumbs up. I like it.
The packaging of this serum is really good. It comes with a pipette as a dispenser, which I found very useful as long as it gets to the bottom. It is a glass container which is always good in my book.
The serum has a usual serum consistency, slightly sticky, like many other similar serums have. Nothing uncomfortable, and after it is absorbed the feeling of stickiness also goes. This was a nice hydrating serum, I really enjoyed using it, I would definitely say it was hydrating and plumping. This product claims have an oxygenation effect on the skin, about that I am not so sure, but I definitely like the ingredients list. It contains hyaluronic acid, vitamins and Alpha-Hydroxid Acids from fruits. This means it not only hydrates the skin, but it also helps to renew it, and that is a big yes for my skin care products.
This serum retails for around 40Euro, which is a pretty good price for a serum with the ingredients it has. There are several similar products by other brands, that could be an alternative. It is a bit more expensive than the Aqualia Serum by Vichy which retails for only 20Euro, and it is also a good hydrating serum. I also felt it was similar to the Skinceuticals Hydrating B5 Serum, which is a bit more expensive than this one, it retails for around 50Euro. All the formulation of these are different, of course, but they are similar products to some extent. One difference is the presence of AHAs in the Lierac serum, which you do not find in the others, and the higher concentration of hyaluronic acid in the Skinceuticals formula, for not much more. It will all come down to what your skin needs and preferences are and how much do you want to spend.
Would I buy this product again? Yes, definitely yes!