[Nemcue]

One big feature in my mind — and I've used both Handlebars, Mustache, and HTMLbars a lot — is the fact that it compiles straight down to a JS data structure.

Especially with Handlebars it's always kind of tricky to debug, because there are all sorts of strange conventions going on, and it ends up being very hard to mentally parse.

With JSX (of course the same with Mithril) you get a data structure that is very easy to reason about.