Working with Eclipse can be difficult at times, probably when debugging and designing layouts Eclipse sometimes get stuck and we have to restart Eclipse from time to time. Also you get problems with emulators.
Android studio was released very recently and this IDE is not yet heavily used by developers. Therefore, it may contain certain bugs.
This describes the difference between android android studio and eclipse project structure: Android Studio Project Structure (v.s. Eclipse Project Structure)
This teaches you how to use the android studio: http://www.infinum.co/the-capsized-eight/articles/android-studio-vs-eclipse-1-0