How is patient satisfaction in relation to paranasal Implants?

Considering a one piece silicone paranasal implant to help correct a flat face and increase midface convexity. How is patient satisfaction with this type of surgery? How does this implant affect nostril shape? What is recovery like with regards to stiffness and swelling? Supposedly this implant gives the illusion of a smaller nose from the profile by building up the soft tissues around the nose.