Clear Drains!
Purchased this product because reviews said it was safe and effective.  Glad I did!  Unclogged bathroom sink drain  after using competitive product but I just thought that it could drain faster.  Used Professor Amos drain cleaner (following directions) and was pleasantly surprised when the water drained as if the pipes were new!  The "safe on the pipes" claim adds to my satisfaction.  I think the price is a little high  and that is the only reason I did not give it  five stars.  Just to be clear, the price withstanding, the results ARE five stars!
Rating: 4 stars