I scored a 2. I'll say that this test is total BS and couldn't possibly diagnose anything because of it's vague questions.
Almost everyone feels down from time to time. As a former psychology major, I can tell you just how easy it is to research some disorder and immediately start going, "Holy shit! I've got this!" just because you might exhibit very minor signs of a qualifier or two of the disorder.
I still score a 2, not because I know how to answer or because my life is great. In fact, I think my life is pretty good, but just because it might be accurate on that aspect, doesn't mean that you should take this seriously. I don't trust any psychological evaluation unless it's certified by a psychological association and at least 300 or so quesitons.