I have to be honest, I hate them! I'd seen so much talk about how great they were that I tried them and just kept getting negatives- totally convinced I was pregnant. I finally remembered that with my son, my HCG started out a little slow; I took a test the day of my missed period and it was still super faint, even my blood test the count was on the lower side. So I thought, let me try a FRER (I'm currently 3 days before period is due). Sure enough, without even using FMU, the faintest of lines came up. Just my opinion. If you're getting a lot of negatives with dollar store brand, try something else.