I have used the android app for a while now, and I have to say that I like it. I use it mostly for reading voting and commenting, but I have tried to do more (answering simple questions) and works way better than using the site on my handset. I like to UI, it looks friendly, polished and.. kind of "unique". It definitely has the traits of an android app but it is not "copy" any of the existing apps.
There are other places where this transition between "SE look" to "standard android widgets" happen. I personally do not like it, and I hope it is due to the alpha version of the app, and will be fixed.
Of course, it is low priority because it works and it is only a minor improvement, but it struck me immediately as "not right".
Just my 2 cents!