My review might be a bit dated, since I had been to the site a long time back. It was utterly disgusting to know that I was to live only for another 7 years and some odd months. Though you dont tend to believe it, I found it demoralising. We were a few friends who were checking out the site together. We entered dates of friends and figured out gradually that it was just calculating vague dates based on the birthdates and all were to live to the age of 36 roughly. It fooled us too.
They have good graphics on the site, but its a prancksters site. Not actually interesting. While the concept is quite novel, the site could be put to better use. With such a name the hits on the site could be more fruitful.
All in all, its not worth checking out, and I have a feeling its fast on its way to reaching its 36th year(remember, all the time calculated was reaching to 36 years). When I last checked the site wasnt working.