Not bad. While I guess it feels nice to have a dedicated app, the mobile site worked fine. Does look nice, though. Will definitely take some getting used to. Writing this journal on the app, feels weird, especially since the keyboard won't shift horizontally. A bit awkward to look through messages, too. This is only the initial release, hope it gets better in the future.
I recall my brother looking for a DA app for me when I first got this phone, there were already two unofficial ones. Didn't like either, so this is rather welcome.