I started using a sulfur soap about 1 1/2 ago, when I felt basically helpless. I stumbled upon sulfur products while I was trying to think back through my past, trying to remember if any product had really worked. The only thing that ever really made a difference for my face was the proactive sulfur mask (the actual proactive system sucks...i used it for 2 months and it made my face so much worse). The mask was expensive, so I started searching online for other sulfur products and found a sulfur bar soap from adovia minerals that works really well. I also started getting the sulfur ointment (around 6% i think) that a few companies make...clean & clear and acnezone.
I will look into that mask though...right now I'm using a dead sea mud mask that I love, but it's $30, so if I could find a cheaper one that's just sulfur it would be great!
I use Queen Helene's Mint Julep Mask. It's $3 in a tube at Family Dollar and Dollar General. Sally's Beauty Supply also carries it in a tub for around $5.