When I tried out AP I found that 2-3 beers made me feel smashed (and I'm a big guy 240'ish lbs).
Twice I drank 8-12 drinks in a night and was still drunk when I woke up in the morning. I was also taking DCP at the time, so I feel like it might have played a role in that as well.
Also I can definately vouch that the AP seemed to prevent any sort of hangover, even the times I was still drunk the next morning from a long night.