I loved reading this so much. It's such an amazing story. I even teared up a few times. That's not something that happens very often. My only complaint is that I wish there was more, Not that it was short by any means though. It took me about 36 hours to complete I think. I wasn't really logging my hours, and I'm a bit of a slow reader sometimes, but I can't imagine reading all of it in under 20 hours unless you're skimming through it without paying attention.
In short: I loved reading this, and I'm sad it's over.