I'm a huge fan of the Skin+Me daily doser night time cream with Tret and have been using it for 18 months. I've noticed a huge difference in my skin, but it took about 4-6 weeks to notice the change.
Skin+Me have recently launched a new Vitamin C serum that I'm considering adding to my subscription. I received a small sample of the firming and brightening serum in my last subscription order, but haven't noticed a difference in my skin yet. Admittedly I've not been using it daily and there's not enough product to last more than another week or so, so it's unlikely that I'd notice a difference with what I've got.
Has anyone been using the new serums? What are your thoughts?