This should not be your only eye treatment. It is not hydrating enough, it is also not super nourishing. It is primarily an antioxidant serum that is designed to promote collagen production with ascorbic acid and reduce discoloration. I always use another more hydrating gel or cream on top. This is more of an investment that you will see results from in a long run, just like other vitamin C serums. It is not a product that will give you an immediate visible effect of plumped up skin and look of reduced fine lines. But I think it is worth for long term use. Price is very reasonable considering I only need one drop for both eyes. I have been using it twice a day for the last 3 months and I am about a third way through.
This eye serum is somewhat hydrating, and I use it more as an antioxidant/protective product rather than to see game-changing results. I can't say I have seen any changes, but it's more of a preventative measure for me. It does oxidize quick, so you have to work through it fast. I've bought a few bottles over the past couple years. The main reason it has stayed in my routine is that it makes me lashes stronger, longer, and healthier due to the copper peptide in it. I think I might stop it though and move onto an actual eyelash serum.