Deeply unimpressed with whichever genius decided to deprecate ADT for Eclipse and force people into Android Studio which is a fork of IntelliJ - not only is version 2.3 still buggy as hell but the amount of setup vs getting going with the old system is awful. Oh, and importing your old Eclipse ANT based products is a festering turd of a feature where I gave up and had to do everything manually (because nothing imported correctly)