I was seeking something effective to unclog hair from my bathroom shower stall. It was recommended by one of the sales staff at my local Home Depot for its effectiveness yet gentleness on the pipes, etc. I followed the instructions as outlined, however, two packs didn't do the trick. However, the third pack did along with some light plunging.
Overall, it's a little pricey, but it did work, and there were hardly any smell or discoloration of the drain. I would use it again and recommend it.
Bottom Line: Yes, I would recommend this to a friend