Hitachi excavator with 2 articulated operating arm crayfish

you have information on two-arm excavator opinions crayfish Hitachi? I see it a bit cumbersome and dangerous, I think is also very unbalanced as machine set-what do you think?
http://ift.tt/2docFsl
:confused::confused:

http://ift.tt/2d2GcNh

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Hitachi excavator with 2 articulated operating arm crayfish