I'd say save your money. As linked piece says, if you have some Neanderthal genes, so what? It's a bit like that with the health stuff too. There are specific tests for specific problems, but unless you have symptoms, knowing there's a risk of Alzheimers, for example, gives you knowledge you can do little with. It might be better not to know, and deal with it iF it arrives, rather than worry for years about something that might not happen.