I used one of these with my most recent pregnancy. I bought 3 different brands at the same time; the 88 cent one from WalMart, a First Response Early Result, and an off brand WalMart one with blue ink, I think it was like $4-$6? It had a plus or negative sign. All 3 gave me positive results, but the FRER gave me the fastest and definitely most clear line. There was no mistaking the line on that. The off brand WalMart $4 blue dye test was the next best, you could see it but it wasn't really clear. It was kind of smudgy. The 88 cent WalMart one was the least best of the three, but still gave me a line. But it took awhile to get there. It was barely there though, really hard to see. But it still worked. I'm not sure what my HCG was, but 2 days later I went to the ER with bleeding and their urine pregnancy tests were coming up negative at that time. Ended up in a chemical pregnancy.