The only thing I know is the literature that my ENT doctor gave me. He said it is a non-invasive procedure that reshapes the nasal valve area, widening the area to possibly help with airflow. I've been to three different ENT's, and two of them wanted to go in invasively and fix my deviated septum, and reduce turbinates, either with coblation or other means. After hearing about ENS, I am not sure I want to take that chance. The Vivaer procedure apparently uses radio waves to shrink and reshape the nasal valve area. But then I saw a an article from an ENT doctor stating, that even messing around with the nasal valve area could cause issues like ENS. Because the nasal valve area is supposed to have some resistance of air.
I have "mild" sleep apnea(use BIPAP machine), had a DISE procedure which showed my tongue base collapsing blocking airway. I use BIPAP with dental appliance and still breathe through mouth sometimes and get obstructions. My ENT says he needs to start by opening nasal airway and then from there, consider other options for my tongue collapse and recessed jaw, like jaw surgery.