I used sulfur for a short while. I used the regular Sulfur 8 grease almost daily. I can't say it effected my growth rate since I didn't use it for an extended period of time but it seemed to help grow in my edges. Castor oil did the same thing though so maybe it was from the daily massaging of that area and not necassarily the product applied. Anyway, it did stop my scalp from itching which was the main reason I started to use it and I didn't stink of sulfur but I was cooler at the time I was originally using it, plus, I don't sweat from the scalp much unless it's hot or I'm working out.
I applied some of the sulfur grease this weekend and since it has been super hot my hair did stink of sulfur so it has been shampooed out and I will wait for winter in order to finish the container.
I hope that answered something lol, sorry, for the ramble.