I'm sure I'm well behind the curve but I bought some products finally and last night used the retionoid stuff for the first time. My word I can see a difference today already!!! In sll seriousness: clearer brighter skin.
Disclaimer I've not spent much on skincare for at least a decade as I felt I couldn't afford anything properly decent. So just oil cleansing. Very basic products so maybe my baseline is really low. But I've never seen a difference like this before. Amazed.