The thing you need to keep in mind is that for AHA's to be effective there needs to be certain pH level. We know our moisturizer is compatible, however we can't be sure that every other moisturizer is going to be at a pH to allow the AHA to still work.

I have! I used the AHA+ with the cetaphil cream moisturizer but I did not mix them together, I just put the cream on first then a bit of AHA. Personally, I did not like the AHA. I stopped using it after two weeks so I can't tell you whether or not it worked, but I did not experience any breakouts or reaction from it. I am no longer on the Regimen. Hope this helps