I bought this product because it was cheap and I wanted a lower granny gear on my e-bike than it currently had. I wasn't expecting much, but when it arrived, I was immediately surprised by the high level of polish and general shininess of the finish. You can see from the tooth profile that it's designed to last, with more meat in the areas prone to wear. First impressions are that my drivetrain is now the quietest it's ever been which may be due to luck and better indexing, having just lubed the chain, or simply the fact that it's raining and wet outside. I don't usually write reviews, but overall I'm super impressed. It gives quiet, confident shifting with absolutely no clunkiness. I reckon this is actually a better product than the other two well-known brands