I am almost at one year of vaping (10/24/2014 will be one year) and just got my annual check up at my allergist where I did a digital Spirograph/Lung Function Test. When I had it last year, I had not yet quit cigarettes. My real age was 33 at the time and my lung age was 43. Today's test was much better, I'm 34 now obviously but my lung age is "< 34" and all of my averages are up across the board. I have definitely felt better over the last 6-10 months once all the .... cleared out of my lungs but now I have verifiable proof that my lungs do appreciate vaping moreso than smoking. Happy day!