I’ve been using Sunday Riley Good Genes non-stop for almost 3 years now. It has done wonders for my skin, especially since my skin naturally has low cells turnover rate; so whenever I see little bumps and hyper-pigmentation; I turn over to the Good Genes to exfoliate and brighten. It has never let me down. I also tried Drunk Elephant’s T.L.C recently, which also aims to retextures the skin. Many compare T.L.C to the Good Genes. I can see their similarity, but you definitely don’t need both!
The Good Genes has a quite strong scent of lemongrass, which you may like or hate depends on your liking. Upon application, it may sting a little bit because of high potency, purified grade lactic acid (why it is so effective) but nothing unbearable!
The T.L.C, on the other hand, comes in clear gel that has no distinctive smells and feel really gentle on the skin (bit sticky though). It’s formulated mainly with glycolic acid, but also other wonderful natural ingredients (hence the gentleness).
If you have really sensitive skin, you may want to stay away from the Good Genes and go for the T.L.C.
Honestly, I don’t see any obvious results from T.L.C during the 4 weeks I used it. In fact, the result was so not obvious that I went back to the Good Genes in the time of desperation, and it transform my skin for good overnight. When you have really crappy skin (knocking on wood), you can even apply Good Genes as a mask for 10 minutes.
If you want to see immediate results, go for the Good Genes.
These are my personal experiences, I highly recommend you try samples of both to see what works the best for you before investing in either of them.