Product review (4 stars): My husband uninstalled pretty all the parts except the motor and the pump
I have no issue with the part. My initial plastic ones broken around 20 months of use and I ordered the two replacement from Amazon. But just as everyone stated in the review - it is a flawed design. I realized this till the last weekend that our dishwasher completely stopped working and the motor does not run anymore. My husband uninstalled pretty all the parts except the motor and the pump. No result and we called repair. Our appliance repair staff stopped by and found that that during the 1st time the roller was broken and fell part - the small pieces ended up got to the bottom of the dishwasher (took a while after the rack was broken). The small pieces stuck at the bottom prevented the dishwasher spinning correctly and thus the motor stopped.
The repair staff replaced the top rack with metal part and fixed once for all. I would highly recommend to find the metal part and not buying the plastic one anymore. It caused more trouble when it breaks into small pieces.