Review (3/5): It's not what I thought it would be
I gave this 3 stars for "Softness" because the brush is average to a bit firmer than what would be ideal and comfortable to use on your back, while the loofah strap is average. The brush bristles are kind of scratchy and not the "good exfoliating" kind of scratchy. They're more like the "ouch, that's scratching me" kind of scratchy. Overall, though, it's acceptable and average.
Next, I gave this 2 stars for "Easy to use" because I don't find this easy to use. The brush is separate from the stick that extends it to reach your back; you slide the oval-shaped brush onto the stick by inserting the stick into a cut out section on the back side brush. The problem here is that it doesn't stay on firmly at all. I ended up with 2 options: either not on firmly enough, so it kept popping off, or pushed on so much that it's very difficult to get off of the stick to use separately. The loofah strap is really easy to use, though. It's nice and long so there's plenty of length to comfortably hold each end and move it back and forth at most angles, no matter how thin or thick your arms or body may be. That's a real plus! But I still couldn't give more stars if only half of the set is easily usable.
Finally, I gave this 4 stars for sturdiness because there's no doubt, it seems pretty sturdy. The bristles on the brush have stayed intact. The loofah strap is firm and sewn solidly -- but it may be too firm. It's hard to get flexibility out of it. The elastic strap handle on the brush is flimsy, but overall, it's a solid set. The wood is a good, solid, well-finished wood without splits or cracks. It doesn't seem like a cheap product that's going to warp and break easily if you keep it away from hanging to be soaked when it's not needed for use. Putting it somewhere nearby where it stays dry is best.