Harmony Testing

Hello! Looking for some feed back in regards to the Harmony testing. I was referred to see a genetic specialist who will do this test. I'm happy it is less invasive, but I'm wondering what to expect with the results..has anyone ever had false negatives/positives? My insurance will not cover it, so it's $350 out of pocket. Not too bad of a price to avoid a needle in my womb lol. Still doing some research but it's always nice to here the opinions of others who's experienced it. Thank you in advance!!