Product review (5 stars): You DO NOT need to buy the gasket! Great build quality on this part.
First off - I don't know why everyone is buying the gasket shown in "Frequently Bought Together." My original dishwasher did not have a gasket between this and the spout on the top that it screws onto, and I've never had water under my dishwasher. I also have done 5 or 6 loads with this spray arm now, and can say the same. No washer, and no leaks. I took the panel off the bottom of my dishwasher to check. Do not buy the overpriced washer!!!! If you're going to be OCD about a washer though, just go find a compatible one at the hardware store for 50 cents.

Anyway, as to the part itself, it fits my dishwasher perfectly. The original one used a compression / ball in socket sort of fitting that simply wore out after a while, making the mere pressure of the water disconnect the spray arm occasionally. The new is much sturdier as you would have to flat out break the part to accidentally undo the snap fittings.

My one complaint, and the trade-off of this part is that the difference in how the coupling is designed means the part does not spin as easily. Sometimes it gets stuck and doesn't spin for a minute or two, though it doesn't do that for the whole cycle. (I checked by opening the door every few minutes on the first run to watch how this thing was behaving....ok, maybe I'm a little OCD...) That being said, this one DOES work! The dishes on the top do seem to get just as clean as the original assembly did before it began failing.

All in all, I'm very happy with my purchase. The decreased amount of spinning is inconsequential to the cleanliness of the dishes, and is a welcomed trade-off for knowing that this thing isn't going to snap off and leave me with a dirty top rack. And you're gullible if you buy that stupid gasket.