Amazing

This stuff is amazing, you have to buy the 'extra strength' for really bad clogs. We first bought this because the shower drain was clogged, we added the specified amount, waited twenty minutes or so and then ran super hot water through and magically the clog was gone, we also had to use it in the sink - same results, the liquid magically cleans the pipes. It has a very strong odor, we always turn on the fan and open a window. We now use it once a month in the shower drain as a preventive measure because of my long hair and have had no issues.