I've been using this for about 2 weeks and I really like it!

I haven't seen any major changes yet but it's only been two weeks :) My skin does look brighter but the PIH is going to take some time to fade.

It's texture is slightly sticky but it is not too bad and it goes away once I use other products from my routine!

The only downside is the shelf life. I've heard that it oxidises quickly compared to more stable vitamin C serums and so there is more effort required to ensure that the bottle is kept refrigerated and in the dark. I also decant mine in to smaller bottles to make it last longer.