I am that person who prefers to know my status on an on-going basis. I had the Signatera at my request shortly after I finish chemotherapy and it was comforting to know that I was ctDNA negative. I was also negative 6 months later. That gave a good baseline. My third, most recent test, turned positive, so I know that I am probably having a recurrence. From everything I've read, I think it is at least as good and maybe better than CA 19-9 but not recognized yet officially as an important test. Personally, I think it is quite important. It is being used in many, many clinical trials now as an outcome measure. That is my opinion.