This is my third power window replacement so I can compare. I find that Dorman products are generally of high quality in terms of fit and finish. Tolerances are held tight and I haven't had any misalignment issues yet (I had this issue on a previous 3rd party install). It's too early for me to say if the engine will last, but I think it will outlive my truck (which is getting older). The part is pre-lubricated with silicone grease, which is very good. I agree with others: lubricate the window glass groove to make it easier for the motor to work uphill.
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