I've moved to use between Eclipse to Android Studio.
It has still some bugs since beta version.
but It's pretty good.
Anyway I've got some bug that "could not fetch model of type 'IdeaProject' using Gradle Installation.
I bring a solution to StackoverFlow that link is followings.
// http://stackoverflow.com/questions/16609666/could-not-fetch-model-of-type-ideaproject-using-gradle-installation
you've to delete default files.
[code]
~/.android
~/.gradle
[/code]

Above folder that when you use Android Sutido first time. it can be made automatically.
after delete these files, you can see that it works well.