You can't squish flat - Awesome!
I'm surprised at how well this works. I'm 6'5&#34; and 270 pounds and I don't bottom out on this cushion the way I do with foam cushions.  I use it on a solid wood seat that I have built for working at the PC (the &#34;Wooden Throne&#34;) since most office chairs only last about a year for me.  I've tried high density foam, memory foam, and others and I normally find the wooden seat pan within a day or so.  The Purple Cushion just springs right back and stops - softly - before I reach the seat pan.  Looking forward to trying the Purple Pillow when it becomes available and the mattress when my budget permits.
Rating: 5 stars