Bests & Worsts Reviews from Amazon

I've seen some one star reviews, no foam action etc. Not sure if they got it resolved or did it wrong. I ran full hot water for a minute or two then put it to the smallest trickle I could, it took some effort for my sink handle to actually trickle. After seeing it say it only takes two minutes (mine was closer to four) I though no way it will work. I can literally hear how much easier the disposal spins. I can see the metal which used to be black. I'm in an apartment where it has probably never been cleaned. The 2nd sink drain I didn't even know was white until this. It had a layer of brown gunk. Simply amazing, I'm shocked how well this stuff works.