is this a reliable brand ?

I saw someone post that the ovulation tests weren't reliable recently so I'm wondering if the pregnancy tests are unreliable also. I've taken every test in the pack and got all positives but 1. I'm finding it hard to believe since we've only been trying for one month and 2. I'm second guessing it because of what the other person who posted said. Anyone have positives with this amazon brand and have it actually be real?