I have downloaded the Stack Exchange Android app this morning and loved the way this app is built.
Being Android developer, I must say it's developed using the latest UI Pattern (Navigation drawer) and there way it would be helpful to reduce navigation and provides User friendliness.
But here I would like to suggest a one point which I found missing in Posting Question page.
The whole app is developed using Navigation drawer and Holo UI Pattern but not followed the Holo pattern in Posting Question page. You can check the input box (i.e. EditText) in below snap. This is not an actual Holo EditText.
Input box (i.e. EditText) should looks like as depicted in below snap:
I know current app is for beta testing and many are saying that it would waste time and delay the beta launch. But here I would suggest programmer of the app to include the HoloEveryWhere library. There is nothing much to do with this library, just include this in project and there you go!!
As one gentlemen has said:
The UI is lovely, and the layout would look ugly with a full holo theme. Not to mention the UX of holo TextBox elements is terrible because there's no spacing.
I would request him to check Gmail Android app with Holo UI.