It depends entirely on the kind of cybernetics you get and what they're replacing. The universal perk of being a cyborg is that your inherent physical features can be augmented, because any machine can be upgraded. The universal downside is that anything that screws with a machine - ion charges, EMP, lack of power, rust, time without maintenance - will affect you, in addition to what affects normal humans.
Otherwise it's a case by case thing. A cybernetic arm might be stronger, or have other features like an integrated datapad, but both of those have their own drawbacks (power requirements and being hacked, specifically).