We ended up with Slate because:

1. readme.io is just painful to use for larger documentations; very GUI-oriented 2. apiary is basically just annoying in every way (I really like the company so I tried 3 separate times to get myself to like their product) 3. I dismissed a couple of self-hosted options that use JS to render the information, since I find that idiotic

Slate struck a good balance between (1) syntax (2) ease of use and (3) good looks, although I wouldn't call it prefect in any of those departments.

Disclaimer: the end result looks surprisingly better than what you'd expect.

Can you share some of your reasoning for ending up with Slate?

I would also love to hear a bit more about why you guys chose Slate over the others. Working on API documentation right now for a University, and leaning towards Slate.