Last pregnancy, I knew I was pregnant, as I was showing signs that are not normal for me. I bought the Answer brand, negative. Bought the dollar store cheapies, negative. I still felt like it wasn't right, so I bought EPT and the positive line came up right away! I was 4 days late, and I am very regular, so that was how I knew for sure. And I tested with all 3 brands on the same day, so it wasn't a matter of HGC not being high enough. This was the only brand that even showed me a positve. So it works fast, good price for 2 tests, and accurate when other brands have not been for me! I bought another box for this time around!