I run Equal in my tires. Basically the same type of deal, but the material is different. The Equal will clump once you get enough moisture in the tire.
Other than that, it worked great for balancing my 31x10.5 SSRs and my 33x9.5 Buckshots.
(Yeah, I know...But the SSRs were already on my Taco when I bought it, and I got the set of Gateway Buckshots (pre-Maxxis, so these are the good ones) with 300 miles on them for $300.)