Maytag Atlantis (and the Top-load Neptune)
Funny, I was thinking of this recently when I saw video of someone's WP Cabrio. My Mom has a four year old Atlantis with polymer tub and has had no problems. A female friend has a five year old one with stainless steel tub and has had no problems. I actually like the slanted front. A friend was telling me that he has a three year old Ensignia model and has similar problems with wet clothes.
I'm pretty sure the Atlantis and similar 3.3 cubic foot tub models use only one belt instead of two. Further, I think the transmission pulleys on these one-belt models is plastic or polymer instead of steel. I'm not an engineer, but it seems to me that one belt instead of two means much less contact between the belt and each pulley. This, along with the added weight of a larger tub when filled, must make it less likely that the belt will get the tub up to speed.
Knowing that Maytag engineered the belt and pulley to allow the some "slip" so that a clutch wouldn't be necessary, to reduce to one belt would be a bit risky, but I know two people who haven't had problems.
Top-load Neptune - That model seemed strange, but so did the WP Calypso models. How bad was it?