Heck yes this Black diamond works better than sand, BIG TIME! I am thrilled with it's performance. I really want to get the bigger one and give it a try, the bag was only $7.88, I think I pay more for sand at my local hardware store. I hope I can find a place near by to get it. I will keep looking, but if all else fails I'll get it where I did yesterday when I go to visit my kids in the Sacramento area.
I have heard it mentioned before but it never quite sounded as you put it and I am so damn glad I read this while I was at my daughters yesterday.