Right now, the mod just adds two new items:
The cyberarm and the cyberleg.
They can both be crafted in a regular fabricator.
To use these new cybernetic limbs, surgically amputate an extremity and apply the appropriate item to the amputated limb.
If your mechanical skill is low, this might take some attempts.

You (or anyone else, albeit made more difficult) can remove your cyberlimb at any time by using a crowbar as a treatment on the limb.
You might want to have a tourniquet apply-ready if you plan to do this.

Advantages of cyberlimbs:

• great at taking sustained gunfire without malfunctioning
  
• excellent at getting gnawed up by monsters without malfunctioning
  
• ideal at sustaining attacks that would normally cause life-threatening bleeding
  
• unattached cyberlimbs double as a blunt melee weapon

Drawbacks of cyberlimbs:

• they don't mix well with water. You should wear a suit or minimize exposure.
  
• they require maintenance if damaged.
  
• costly to make
  
• violently detach if critically damaged