I have the brookstone biosense pillows and did get them at the sale price.
However, I had the chance to see them in person at bed bath and beyond first.
The core is firm, the zip on surrounding has very soft down alternative that keeps good loft.
I tend to like a firmer pillow.. I also have a set of Sealy gel fiber pillows that I like.
So far, I'm happy with the biosense too and they hold their shape of you want one behind your back.
Hth.