No source? The first thing I did was try it on itself... which I suppose is somewhat of an "acid test". It took a few minutes and an enormous amount of memory, but finally it told me that the function at the very beginning of the executable, definitely a nontrivial one, decompiles to...

    void fun_401000() {
    }

I'm sure I hit upon some edge case and much better output can be had from this tool if I play with it some more, but for a first impression, not so good. But I'm definitely going to keep this one around, it looks promising.