I have been using this for about a month now, and somewhat to my surprise, it...

I have been using this for about a month now, and somewhat to my surprise, it seems to be making a difference. I've been using retinoids for years--decades!--and I think it's one of the best things I've done for myself. I've shifted back and forth from a drug-store version to several different higher-end products, though, and haven't noticed any significant difference between them, so the drugstore version has been the one I've relied on the most. I decided to try the Sunday Riley serum because it was on sale, the reviews were promising, and I was in the mood to experiment once again--and I'm glad I did. I'll be 70 in a month, and my skin is generally in pretty good shape, but I've been disturbed in the last year or two by deepening lines between nose and mouth and then mouth and chin, plus the little lines all along my lips. Nothing has had much effect on them, until I tried this serum. The big vertical lines are still there, but they seem less deep (though more red for some reason; I don't know what's going on there as there doesn't seem to be any irritation). The lip lines are noticeably less visible, and that made my whole mouth look less pursed and so a bit fuller. This stuff is expensive, but it may be worth it. I'm certainly happy with it so far.