Best Answer: Adrian,
I can only tell you what I know and do myself, not the "official" answer. I use a spot acne treatment and I use the recovery concentrate. I use a different eye and moisturizer. My routine is eyes first, then acne, then concentrate, then moisturizer. As this breakout control appears to be an allover lotion I would probably apply recovery concentrate first. This allows it to really soak in. Oh, and I love love love the concentrates both day and night.
I will also add that I've tried this acne treatment and it did not work well for me. I really love their blue herbal line, though. I started using Kiehl's in my late twenties and used to use the blue herbal moisturizer as well. Now, I am in my forties and moisturizing is more of a priority so I only use the blue herbal spot treatment.
Hope this helps! Happy moisturizing.