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Has a lot of kickback when trying to use to get rid of grime in showers. Even with holding it on grime that's had cleaning products on it, it does a meh job at getting the grime off. Decent for some of the work but the white and blue disks also don't stick well when they touch up against anything to clean. Overall, better than scrubbing with my hands, but need to figure out a way for it to work better for me.
What can I say? Attach these brushes to a drill (cordless/corded, no matter) and put the business end on the surface that needs cleaning. I used it on my bath tub and it does a WAY better job than I ever could with my scrub brushes. I want to add that I bought this specifically to clean my tiles and my sink and possibly my stove. Those are harder surfaces. I wouldn't put this on a wall, specifically dry wall, and hammer down the trigger.