I really like the design of the head,its different from other common robotic heads and that makes it unique and better
but the front of the legs could have some better line they look pixelated
also the blue circle could have some lighting effects
overal 8/10
The back of the legs and thighs doesn't fit in with the rest, it looks pretty bad.
Although the set looks alright it's very unoriginal, next time try to use your own ideas. If you get inspired, don't copy the whole thing really similarly but take elements from it and mix it with your ideas.