I had similar results as Rich. Using the same input a number of times, I got a wide range of life expectancy. What was interesting to me was the fact that I changed some of the responses to be worse, expecting to get lower numbers, and still got basically the same life expectancy range! (To be fair, I did get a couple that were a few years lower in there, but only by 3 years or so... When I'm in my 70-80s, I'm not so sure 3 years are going to make that much difference to me... I'm sure I'll change my mind when I get closer.