Bests & Worsts Reviews from Amazon

So the little tiny brush needs longer bristles in order to truly get into the corners in my fiberglass shower. But the big flat one does a good job on the flat surfaces, and the toilet-brush looking one is my new favorite tool in getting rid of the hard water ring inside the toilet. I got this set yesterday, and today I went after the crusted-on water deposits. I don't know what it's made of, because CLR won't touch it, acids of any type won't touch it, and strong bases won't get rid of it either. The only thing that gets rid of the brown ring in my toilet (until today, anyway) is a pumice stone mixed liberally with elbow grease. The same is true of the brownish drip marks that totally cover the entire fiberglass shower and tub. Today I busted out this brush set and a set of the red scrubbing discs also made by Drillbrush. First I tried a liquid cleaner but that did nothing, so I rinsed that off and used bar keepers friend instead. I went through three drill batteries and a half a tall can of the abrasive, and now my shower and toilet both look pretty good. I won't say it's perfect and my arms are toast right now, but I'm very pleased. The brush and bkf did a much quicker job of eliminating the brown rings in two toilets than pumice does, and I didn't have to get as up-close-and-personal with the toilet water. Was it magic? No. Did it eliminate effort? No, but I will say the sheer number of scrub motions applied by the drill were definitely not going to happen if they had to be done by hand, so it did reduce the hand-work involved. I think the only tool that might have done the job quicker would have been a power sander, and I really didn't want to go there. I definitely like the brushes better than the scrub pad, for reasons I'll explain on my review on that product. I tried the brushes on two different drills, and the one with the bigger, better battery is my pick for this application. The 18v Makita with huge heavy battery kept running longer and faster than the smaller, lighter model. I am sure there are folks out there wincing at my use of a heavily abrasive cleaner on a fiberglass tub/shower, but all I have to say is the previous owners patched holes in the tub with some sort of really bad bondo job and didn't bother to paint it or whatever you do to resurface a fiberglass tub. My ultimate aim is to replace it but in the meantime I'd like it to grow fewer stalagmites.