I just poured it into a clogged (slowly drains) toilet, so there are no results yet. I'm writing about the one listed ingredient, and I'll return after letting this sit overnight.
The three-pack tube that I bought at Home Depot for $9.99 lists only "monosodium sulfate and other non-hazardous ingredients." Good luck Googling that chemical. The best I could come up with was in relation to hair conditioner, of all things: "Monosodium sulfate, also called sodium bisulfate, is a mild nontoxic acid, most likely there as a pH-balancer."
That was written by someone just like you or me, a guy offering an opinion.
I suspect it IS a very weak acid that slowly ("overnight") eats away at organic clogs. It's probably similar to boric acid, which is so weak that it's used directly in eyes to treat pink eye.
I'll come back tomorrow with results. I'm clicking that I wouldn't recommend this because a click is required to post this. I rated it three stars for the same reason.
Bottom Line: No, I would not recommend this to a friend
UPDATE on 8/24/17: Left two doses in the toilet overnight. Nothing. I followed the instructions and added one more bag and waited overnight. Nothing. Then, drained the water and scooped out the undissolved powder. Later, I added one dose of evil chemical drain opener. Ten minutes later had a cleared clog.
This stuff is weak enough to brush your teeth with.