I have played the Assassin Class since Beta and I really enjoy it. The Assassin does, however, take alot of thought to playing instead of being able to just ROFLPWN everything in an instance. You have to become intimate with the build and the rotation and use interrupts effectively. Once you have that down it is a very powerful class. The stealth and backstab is nice but destroying stuff with darkness and lightening make the class even richer. Plus, you can wield a dual sided lightsaber which is equally awesome.