I found the ScrubTastic to be very effective in cleaning my walk-in-shower and it removed soap scum and ground-in dirt.
The problem is that the second time I used it, when I tried to turn it off, it refused to turn off. I flicked the switch several times and it would not turn off. I had to disconnect the three pieces in order to box it up and return it to Walmart.
Bottom Line: No, I would not recommend this to a friend