Very nicely done. Definitely looks like it wants to take a piece out of somthing!

I kinda like the older style "chunky" transformers more than the newer more intricate look, but the detail work you've done here is excellent.

There's a kind of blockiness to the proportions that's throwing me a little. The shoulders are so low the arms look too short. This looks intentional and not accidental.

Very nicely done!