Has anyone had Signatera testing (genetics-based cancer test)?

I'm wondering if anyone here has heard of or had Signaterra testing? I just learned about it from a neighbor who works for the company that developed it. I have Stage 3b ovarian cancer and apparently that's one of the indications for having the testing done. It sounds like a good thing to do but I've never heard about it before and that makes me wonder....
Thanks for any information!