Remember that OSX makes fonts a lot thicker so this font looks insanely thin on other OSs. I'm on linux with ubuntu font rendering which is somewhat thicker than windows and it looks to thin to me.
Usually this means that it will look impossibly thin on Windows.
Wow, I had absolutely no idea. I'm on a Macbook so I'll definitely be more mindful of that from now on. Thanks so much, this is super helpful. And thanks for the suggestion!