I have a full size down comforter and a new, extra large, top loading LG HE washer. This product did a fine job gently and thoroughly cleaning my comforter, leaving behind no scents to bother me, but as we know a lot of patience and human interaction is the key to success. Below is my top loading success story. Commercial front loading is so much easier, but wasn't an option.I didn't have a duvet cover for a while. So my comforter was dirty.My tub will fill with 40 gal, so I chose to use 250 ml of Nikwax.I suspected that wasn't enough soap, which is judged by when the water starts to feel slippery.But it was more than the max fill of my dispenser. So I backed off to 200 ml and chose the Bedding cycle.After letting it fill and do its thing for 5min, it's time to pause it and get busy squeezing out the air. In a top loader, you'll never wash your down comforter if it's floating above the water. It's like a life jacket, and that's impressive. If there's ever a flash flood, grab your comforter.So you squeeze and squeeze and work around this heavy thing, which is really hard to do. If you get exhausted, try a different technique. You may have success with a vertical drop and a horizontal tug. You've got to get that air out, but it doesn't have be perfect. Just make progress. Next resume the cycle, and then 5min later pause, squeeze, and resume. Your final goal is to get 90% of the air out, but you won't get there in one wash usually, because the washing part of the cycle is only 20min. What happens is during the spin, the weight of the comforter will push out more air, leaving it like Ken after Barbie left, somewhat deflated.I repeated washed my comforter on Bedding cycle a total of 3 times, using 200 ml, 250 ml, and 300 ml of Nikwax. The final wash it was a tiny little thing with at the bottom of the tub with all of the air pretty much out. It took all day. Then it's on to drying with six wool dryer balls on the lowest heat setting, slow and steady, adjusting things often to avoid hot spots when the comforter expands and blocks the holes. Okay have fun!