After a year of use, I can say that they have not at all flattened and unlike other pillows, they do not squeal, and remain well bounce.
Also no problem biting feathers or exit the pillow as with others, but here at all.
The traditional square shape allows to be compatible with all standard pillowcases.
Sleep is excellent because with the very fluffy down, it seems to float smoothly. This is a real contribution compared to synthetic or foam pillows. I think this is the best pillow I had!
I totally recommend you, no disappointment either at the reception or after the experiment.
They are described as a luxury hotel quality and frankly it is. I've found a comfort similar to those of large hotels.
And appearance of visually really is, we often compliments me.