Product review (5 stars): Genuine part, easy to install, works perfectly.
We have an older HE3T washer and the sump pump gave up. I checked my options for available parts and ended up going with this genuine Whirlpool part even that it cost some 40% more than the aftermarket pump. The main reason for it is that the housing of this pump matched exactly to the one to be replaced in the washer. The aftermarket part has the smaller outlet facing straight upwards instead of the 45 degree angle on the original part. That likely won't be a problem for most applications however, in our washer specifically there is little clearing above the pump and I was concerned that the drain hose would not clear some of the parts above or even kink. Based on this experience I recommend that you inspect your washer before buying the replacement part to avoid surprises.
Bottom line is that this part matched exactly what was in the washer and it works perfectly. Installation is simple although reattaching the hose clamps can get a little iffy because of the tight space below the washer drum.
Good Luck!