Aristotle had said: "Quality is not an act, it is a habit."
I am not an expert in WordPress themes, but I can definitely recognize quality when I see it. Quark, despite being a free theme, is a high quality theme. I highly recommend it.
After doing extensive research, I decided to work on it in order to replace my tech blog's 8 year old theme.
Anthony, thanks for releasing this theme under the GPL.