I had the NF test, but only because it was the only way the MW would refer me for a 12 week scan and I wanted to see the baby. We did talk about what to do if it came back high risk, and like most others, wouldn't have done any more testing. My view was that we could handle having a Downs baby, but that I would prefer to know in advance rather than getting the shock of diagnosis at the time of birth.
It's such a personal decision, and I really feel for the women who are "high risk" and deciding what to do.