I had a great experience with Goat's Rue! I had tried everything (beer, oatmeal, More Milk Plus, alfalfa, nursing/wearing baby constantly...), but without much increase in supply.
When DD was 4 months, I decided to try the capsules, and it really made a difference. After about 10 days, my supply went up pretty dramatically, and I was able to pump more than before. I've reduced my dose, and now take maybe one capsule daily. It seems like the the initial dosing was just the thing to increase my supply, and it's just sort of stayed there. Of course, it's different with everyone, but I responded really positively to it.