Great question John. 
To be honest with the Rezum procedure and my Urologist. I have had a sensitivity to pain all my life and various so-called drugs as Valium do little to keep the pain at a minimum. During the procedure, it was a Horrid torture for me. Pain is one of the triggers that kick me back into AFIB and I missed my 5 year AFIB free anniversary. 

Only minor pain and discomfort after the procedure. Regarding urination, took me 6 weeks until I began to notice a  positive flow. Eleven months later and this guy has no regrets from the Rezum procedure.  If I did it again, it would not be in a physician office. There is nothing as sweet as being in Normal Sinus Rhythm.

Back to the pain subject.  Ask your doctor damn hard questions regarding pain management and not the script used by the Rezum talk. Need to point out, I went against my own advice I share with others.  Pick out large volume hospitals and a Center of Excellence Physician. Rezum site has a Physician finder. After the procedure I did tell my Doctor I was not a happy guy with him and his pain management and for him to tell me the reactions from other patients. His reply was the large majority of the patients seemed to tolerate the pain and experience little discomfort and then the other side of the patients as myself  is another story.
Hope the above is not too confusing.

Ferris Watson