Pros: ? Depending on the look you want, lowering may help your look or style. Also modifying the suspension of a sports car helps with dynamics and handling.. however I really don't think this is the case with trucks.

Cons: Horrible ride. Rough, bumpy, rough turns and curves, floaty feeling, bunny hopping..

You don't lower a truck in search of a better ride, that's for sure. You lower a truck for the look or the style.