With PB, I am much less prone to heavy flooding (always have had enough warning to make it to the bathroom, though). The I-had-better-not-leave-the-house kind of days are now rare and mostly due to paranoia. I still have the problem that a particular day (day 2 usually) will "deliver" 80-90% of the total output for that cycle. Ugh.
Generally TOM has trended a little lighter, and the horrid cramps have been reduced to almost nothing (providing just enough of a twinge to warn me). Also, my schedule is longer. Pre-primal, I had attributed the gradually shorter "months" (25 or 26 days) to normal aging. Now it's a cycle of 31 days or a little longer. I've been primal since June with no other radical changes except diet.