Are these fertility suppliments worth it?

I just saw somebody commented on a post saying to use these, and I’m just researching them. Has anyone used them? They claim to be amazing and state they’ll refund you if you’re not pregnant within 3-6 months?! I’m currently using pregnacare before conception pre natals because I trust them and I used Pregnacare when I was pregnant with my son. But I wondered if these were good