> This doesn't make using their apps a "non-starter".

I don't think the parent meant a "non-starter" in general. This app seems really awesome, but I primarily develop on Windows, so it's a non-starter for me, which is really too bad. I was really excited looking through the page until I noticed it was only on OS X.

That and I'd prefer my electronic notebook to be available on my phone as well, so that's another reason I wouldn't use it. But if this ever comes out for Windows/Android, I'd definitely be excited to try it out.