My skin is very sensitive and I was looking for a hyaluronic serum with no added ingredients, impossible I thought - until I found this one. It looks thick and jelly-like in the dropper but on the skin turns into an easily spreadable soft serum. I did not find this pilled which has happened to me with other HA serums, it just left my skin smooth. The bottle is very nicely designed, you press the top to release the dropper, so it never leaks, as can happen with glass dropper bottles. The only drawback is the bottle is opaque so its hard to know when you are near the end, and as it comes out from the dropper in big blobs it is easy to go through it quickly. I am very happy using this as my serum and will keep buying it forever.