I use this brush to clean our bathtub and tile surround. It is very good, scrubs away soap scum, makes the glossy tile shinny without scratches. It is a little tricky to use in the corner due to the scraper top. Still, it does the job way better and easier than a small scrubbing sponge.
I bought this scrub brush to use on my mountain bike and it's the perfect brush for it. The bristles are soft enough to not scratch your bike but strong enough to get mud and gunk off all the components/tires. I've only used it once since I bought it but the quality is nice and I feel like it'll be sticking around for a while. If you are looking for a brush to wash your bike then look no further.
I realize that my use probably does not align with the intended purposes of this 20 inch gong brush, but it really works great in the shower! I previously had tried numerous plastic bath poufs / scrubbies / synthetic loofas, etc, even ones attached to a plastic wand with varying degrees of success/failure. The ones attached to a wand simply fail to remain attached for very long. Using the scubby by itself without the wand leaves many areas inaccessible for me for effective exfoliation. The design of this brush completely avoids the detachment problem, and the 20 inch handle is perfect for accessing my back easily. The bristles generate enough friction on wet skin to exfoliate the top layer of dead skin cells, but they are not overly "rough" (in my opinion). Those with more sensitive skin may find it too rough, so your mileage may vary. Home Depot also sells a similar brush that has yellow bristles and is not soft (model 226MBHDXRM) and is too rough for use on the skin. This one is just right!