Sneak Peek Gender Blood Test (from home)

I've heard of women doing the NIPT test for gender, but recently stumbled accross sneakpeek.com. It's way cheaper and you do it from home using a finger prick and send in your blood sample. the lab then tests for male DNA in your blood and if it shows up= boy and if not= girl. has anyone tried it? the website says it works as early as 9 weeks and is 99% accurate. they also offer a full refund if the test is inaccurate. I'm ready to try it in a few weeks!