I've been using it for several months since the developer beta came out; overall I'm extremely positive on it. One of their better releases that seemingly focused more on quality and refinements than new-features. Siri is definitely worth using now, even if it remains still a work-in-progress/needs continued refinement. It can surprise you in good ways, but it isn't consistently good yet. The keyboard remains unfixed…
How is the keyboard broken? Maybe I'm so used to whatever it is that I'm blind to it.