I use NIV every night and have also successfully quit smoking with your program. I am now able to go back to church. I had stopped going of the because of the walk from the car to the pew. I was pretty much stuck in the house because of my breathing. I also now am able to go play cards one night a week. I have not been readmitted or been back for any unscheduled doctor visits and will will not go with out my NIV!