Blender + Yafaray + post in gimp. My learning is coming slowly.
A little C&C from me, hope you don’t mind.
It strikes me as being a very empty room. There is no chair for the desk, and a couch would look nice in the foreground, but just something, right now it isn’t very convincing that someone lives there, or even as a show room.
The chair you have has some texture issues, namely that it seems to large for the fabric for part of it. shrink that texture down a bit.
Nice render whatever the case, the lighting is great. keep blending!