My son had low oxygen levels in the hospital after being born, so I ordered this immediately. He ended up being fine by the time we left but I love having this! He doesn't use it every night, but it's wonderful to have when he's sick, or when I'm concerned about anything. It's wonderful little tool, I like that you can change how loud it beeps and the oxygen levels that they'll warn you at. It's also amazingly easy to set up. I have nothing to compare it to, so I don't know how accurate it really is