I don't have nor have ever had asthma. But I DO have COPD. (Compulsive Obsructive Pulminary Disease). And I just got my dse-901. For me, my first attempts at vaping are NOT good. I had quit smoking back in February for 3 months and taking Symbicort helped my lungs improve dramatically during that time. Then some butthole bought me a pack of analogs on my May 30th (44th) birthday and said 'have fun'. That was all it took and I've been back to a pack a day since. But my COPD is getting worse since and so now I was looking for a way to help me quit analogs. My doc won't prescribe Chantix due to increased suicide rates. And then I found this wonderful website. I read and read till my eyes were sore, and then finally purchased the DSE-901. At first try, it was awful on my crappy lungs. Maybe I just need to get off analogs first before I can give an acurate assesment. But COPD and vaping at first, don't work. Vaping seems very harsh to me, cousing me to cough up alot of phlem, and maybe I just need to concentrate on getting off analogs to see if I improve like all of you did with your asthma issues. Somebody wish me luck. And I hope NONE of you get COPD. It's not fun. But, if I quit smoking and stay on Symbicort, I WILL get better. Vaping DOESN'T seem to be the answer today. BUT, maybe if I stick with vaping and get off analogs, maybe eventually I'll be fine. Darn, why is quitting analogs so hard? Thanks for any input you asthma peeps might have.