Preseed- need some help please!

Kristin • Married 2014👰🏼 miscarriage October 2014🌈baby boy December 2015💙 baby girl due July 2020💕
I keep seeing all this stuff on preseed. I went on their website and they had all these success stories.
​Does preseed really work?! Trying to learn more and see if I should try it.