It looks like a good way to sequesture organic carbon back into the soil. I would have to look what else it is adding to the soil to make comment on how good it is.
I am presently work with a totally natural humate product produced by TurfPro USA. (
Turf Pro USA - Home) that is all natural and contains all the trace elements I look far and has a real storehouse of soil biology in it. I like it because I am getting humates, trace elements and soil biolgy in a single 100% organic package.
I ran into it at an orchid society meeting several years ago and have had great success with it on everything I have tried it on. The thing that sold me on it was I like most was having a real problem with scale on many of may bromeliads and had tried everything to control them. I started using this stuff on them when I would feed the orchids and within a couple months the scale was gone and has not come back. Also, I do not have to worry about the health effect of it on my dogs and wild life in the area.