It worked
I bought this for a sluggish shower drain.  We live in a manufactured home, my husband is picky about what drain cleaners he uses.  Once a year he buys a drain cleaner and puts it in the shower drain.  It NEVER works.  I bought this when he was out of town on business.  Followed the directions.  The first application didn't work.  The second application I let sit in the drain over night before trying it.  That did the trick.  Water now flows down the drain in the shower like it should.  And since I got a two bottle deal I now have a bottle on hand for next year, if the drain gets sluggish again.
Rating: 5 stars