I too was sceptical, but am totally converted. If you think about it, that fat floss part is like 300 patches to clean gunk, way more than I'll ever use, and I like cleaning.
I put some solvent on the brush part and soak the last 3" or so of the tail in break free.
I posted a thread on AR15.com asking for negative feedback, never got any. I bought some for everything I own.