I'd put Xamarin at or near the top for currently available dev environments of cross-device/OS apps. But for creating Android-only, doing that via Xamarin (or Phonegap or Titanium) compared to the tools closer to the OS/VM combo found there (Java, either via Eclipse or Googles new IntelliJ based tool) seems more indirect and not the best choice to me - similar to preferring Java for targets *only* in Win space. One possible exception I considered might be better support to external/elusive printers via Xamarin - no idea on that over here.

>I'm not sure what you're asking here. Why what?
>
>The question I answered asked about Android. It didn't say anything about other platforms.
>
>
>>for cross pad/phone I'd put Xamarin near or on the top, but for *only* Android as well ? Why ?
>>
>>>Xamarin Studio
>>>
>>>>What would be the easiest tool to write an app for Android?