I used 5% and 10% for about 5 months and my skin wasnt clear once during this time. It improved when I used 5%, but my face was still bright red and sore - i'm on week 11 of the regimen and ive been clear for about 3 weeks now not only that but my skin in general is the best its been for a long time because its no longer dry or irritated.

For some reason BP works better at 2.5% - there are scientific studies to prove this And it works best if you follow the rules of the Acne.org Regimen - another factor to why my skin got clear when i switched to the regimen.