I'm convinced!
For some reason, I've bought all the other tub/tile cleaners but I never bought this one.  Maybe because it has a modest design and no crazy claims on the front, but I really missed out and went through a lot of heartache and [arm] pain with the other cleaners trying to get the perfectly clean tub and still never got it.  Soft scrub is the only product that I didn't have to work up a sweat to clean my tub and it came out shiny and new in 30 minutes and bonus that it can be used for the toilet or anywhere else.  I'm convinced.  This is the only product I need from now on.
Rating: 5 stars