Hi pinccasi, I loved it, & it got me pregnant. I used opks first off, but then switched to monitor, which identified I ovulated late, & different days each month! Between cd18-22. So was so helpful, I wouldn't have found out without it, and the high days are really helpful too for when to bd as it detects a rise in estrigen shortly before ovulation. It is pricey but you can use it again or lend it to people, and hopefully it'll work like it did for me, then its worth every penny. Good luck!