"been on this one or gildess 21 day, for almost five years. i didn&#039;t feel a difference between gildess and this. i love how this regulates my periods. i always know when the first day is coming, and the cramps and heavy bleeding only last one day, on the first day, when they lasted longer before the pill. i will say, i have forgotten to take the pill until the next day and felt fine (would still use backup birth control) but the one day i lost the pill and didn&#039;t take it at all, i got a massive migraine a couple days later. probably something to do with the hormones. if you have some anxiety on it, try daily vitamin b. it helped me a bit, although i know that isn&#039;t the definitive answer for everyone. overall, i would suggest this pill."