I experimented with using AHA+ on its own (after successfully using all the regimen products) and it was a disaster. I went from perfectly clear to perfectly covered in acne again. And then I had to start following the regimen again, including getting accustomed to BP and all the pain and hassle that entailed. So for me, using AHA+ alone didnt work, but incorporating it as part of the regimen worked really well.
HOWEVER, I do know that there are a few people who use AHA+ by itself and successfully remain clear (so jealous!), so again its a personal thing and one that you will need to try if motivated enough.
After remaining clear for around 1.5 years following DKR (The Regimen), in March 2013 I decided to change to Epiduo. I use a pea size amount of epiduo each night, followed by a layer of topical antibiotic (Eryacne). I also apply Eryacne every morning and moisturise twice a day. After switching to Epiduo from the regimen I found that it took a good 3 months to get back to being perfectly clear again and now I might get one small pimple appear per month. I can live with that
I started following Dan's Regimen in September 2011 after suffering with acne for 20 years or so. I followed the Regimen instructions exactly and became 100% clear within 9-11 weeks. In December 2011 and after being consistently clear for over a month, I started to slowly reduce the amount of BP I used until I was only applying BP at night. My skin still remained clear however I sometimes switched to applying BP twice a day for a few days (perhaps once a month) if I felt a few under skin bumps starting to come up. I used acne.org products (including AHA and jojoba oil) and sometimes cetaphil moisturiser at night if I felt my skin was especially dry. In the gallery I show my week by week progress following the regimen.