Thanks so much, Jess, for creating this thread! Aunt Flo was MIA for a couple of months and showed up on Tuesday so I hear ya on that part. ::grumble::
I just started on the Flex plan on Tuesday switching from counting calories. I am loving it so far- MUCH easier and more flexible than counting calories! I also like earning the AP part as well. For some reason, I just feel really more positive about this, like this is IT, you know? I also don't feel deprived compared to South Beach, calorie counting, etc.
Kim- yep, I have to agree because you have to do what works for you be it core, P+ or flex.