Software: Blender 2.64 and GIMP 2.8
Render Time (2000 samples using 6GHz CPU): 11 hrs. 29 mins.
This is actually my first “real” project using the Cycles render engine. I found my inspiration for this scene from a real loft in Minsk, Belarus(http://freshome.com/2012/12/20/beautiful-and-cozy-design-with-rusty-pipes-as-odd-elements-of-decor/.))
I had a lot fun while creating this scene. Creating the couches was challenging. It took me a while to make them look fluffy and soft, without particle hair. The rusty pipeswere added as elements of design.
All of the compositing was done with in Blender. I used GIMP for some minor post-processing. Keeping it open-source!
P.S. Keep your comments as harsh as possible.