Very good.
I know there've been complaints about the realism of Miss Wiseman's supposed autism portrayal (although personally I'm not sure that was really what was shown onscreen anyway), but Tilly was for me an excellent example of positive female representation. She was flawed, she was human and she was fundamentally decent, she was someone that viewers of both genders could relate to as a realistic example of an ordinary human being in extraordinary circumstances.
That to me is what positive representation looks like, not idealised paragons of perfection, "evolved" humans who bear little resemblance to the reality of our own experiences. I'd love to be a fraction of the man Picard is, but in reality I can't empathise with him because he doesn't represent me, he represents an ideal, a set of ethical principles embodied in human form. He's as much a fantasy figure as the ship is.
As a man I always felt more akin to McCoy (minus the casual racism) or Archer, both imperfect, both frequently out of their depth but muddling through as best they can. Female posters may disagree with me here but I suspect many would relate more easily to Tilly than, say, Beverley Crusher.
