I had a blast of an experience working with Boe Larsen as my Buteyko instructor. Over the course of month I went from being able to hold my breath for approximately 15 seconds to approximately 40 seconds and still improving. I sleep better, my skin looks better, I have more energy and focus and above all it seems that my diagnosed asthma has disappeared! I haven't used any medication for around a month and a half, and so far it feels like it will stay that way, if I keep up my Buteyko sessions. Nothing in life comes without effort and this effort is so worth it.
Disclaimer: there is no guarantee of specific results and results will vary.