I have been using differin for around 4 months now and I am so thankful to God that I started using it as it has worked very well. Initially, in the first week I started getting more painful pimples/zits but slowely all went away. My skin looks renewed and smooth. I have a lot of acne scars and I am also seeing a difference in the depth of scars, i-e, it looks more evened out.
I am also using clindamycin in the day time and differin every other night. Make sure you put a very thin layer of differin and avoid contact with the skin on other part of your body (I got pretty bad rashes on my arms and neck as I sleep with my arms cross on my face sometimes).
Other than that, I have a good experience and I hope that my acne completely clears up! :)