Unity actually isnīt easy to use. While I like their code system, it is probably more demanding than gamestudios.
But their editor is nice of course, that just isnīt enough to create good games wink.
I btw just added a shader to their Wiki wink.

Lite-C Tut. 1 Lite-C Tut. 2 Lite-C Tut. 3 (en)
Shader Tutorial (ger)

http://www.slindev.com