I was hesitant to wash my king size quilt in my top loader. But, I have a Speed Queen, large size, and it is made with the old style movement, where the agitator swishes back and forth and doesn't swish in a circle like the 'modern' top loaders. After debating with myself, I decided to give it a try, ready to stop it, if it seemed too trying for the washer.
I set it on the bulk load and gave it a whirl. No problems at all, not even extra noise, it sounded just like a normal household laundry load. Didn't even get off balance in the spin cycles. -- In checking, it also washed well enough that all of my chalk and marker marking were removed in the wash. Didn't have any issues with the dryer either (a Speed Queen as well), put it on for an hour and it was totally dry.
If my washer had the 'modern' agitator that swishes in a circle, I wouldn't have put it in. I used to have a washer like that before I bought my Speed Queen and even jeans/sheets/towels got all knotted up. With the Speed Queen - I've had it for a year now. No tangles or knotted up clothes at all.
It was more expensive, but well worth it. Especially since when I purchased it, there was a promotional warranty of total coverage - all parts and labor -- for 10 years!
My last washer only had a partial warranty coverage of 1 year unless you purchased additional coverage and it still wouldn't cover all the parts or labor.