Have you tried the method yet? I've had some intense experiences with it in correlation with psychs and on its own. Mild visionary states are easily achievable if discipline is used with the method. I used it daily for about 6 months before I had to let it go and switch to a more mellow mode of breath work. It ended up giving me severe chronic pain in my neck and cranium from too much forced inhalation. Although, it did give me health benefits and it was fun to do!

It seems like you're interested in it and I would recommend trying it out for sure. My only advice would be to really focus on relaxing the other parts of your body while performing the breathing and going about it without attachment. I found it works best after about 5 rounds but you can go beyond and really focus your energy on particular parts of your body on the exhalation hold.

I started a thread about it a while back here

My brother has also induced DMT like breakthrough experiences on mushrooms while king multiple rounds of the method.

Peace and Love

-SM