I really appreciate their attention to details. iA writer is a good example. Simple and flawless, however, I cannot recommend it to hackers since the functionalities are quite limited. Sometimes I use it for taking quick notes and that is it.
The "flawless" sounds a bit contradictory seeing how you follow up the statement with some arguable flaws.
I've always thought iA writer's simplicity was a gimmick. The whole notion of "distraction free writing" as a quick cure for the user's inability to focus is a hard promise to deliver on.
Come on, iA Writer is not competing with Emacs.