This is really awesome. Great lighting and mood you've set. Nice work!    
I just featured this on the RenderHub CGSociety page.  
https://renderhub.cgsociety.org 

Excellent Work !!!!!! The detail and composition is wonderful.

An absolutely fantastic scene!

Outstanding render. Love the idea.

Cool image

The threast is real.

Hopefully he's just there to pick up a load =O

Every bit of this is enviably good,  =)

Beautiful, elaborate scene. The lighting is really great.