Not just you. The font is absolutely too thin to be used for body text. It might be more readable on low-res screens that hint the strokes to a full pixel widt

Not just you. The font is absolutely too thin to be used for body text. It might be more readable on low-res screens that hint the strokes to a full pixel width, but on Retina screens it's simply too hard to read. Thin weights like that are meant for display uses (titles, posters, etc.), not body text.