I've had excellent results. Reduced my steroid inhaler by 75%. Happy to explain to anyone interested.
I am interested...instead of asking you could have posted it right away.
It's a safe process, that takes a few months, and has to be practiced daily. It's based on the Bohr Effect, and trains you to tolerate high normal levels of CO2 rather than low normal levels, so as to facilitate greater release of oxygen from hemoglobin. It's used widely in Europe. Patrick McKeown is the best proponent I've found on the web.
My understanding is the buteyko is quite expensive and not that easy to practice. P,ease say more about how much it cost you and where you did it?