Flaky is the right word. I assess Mills purely on the basis of 20+? years without anything to show for it = something wrong.
I was going to add the 30?m dollars he's earnt received, but compared to other possibly-optimistic startups*, I guess that isn't all that much.
edit: Also, publishing your 600+ page thesis on why the last 50+ years of physics is wrong - without a fancy experimental proof - is a pretty ballsy move, to say the least.
We are yet to see Musk's textbook on Rocket Science, for example.