Bad Value, Save Your Money
This seat cushion was a big disappointment.  I bought it because I watched the video advertising their Purple mattress, for $1000, and thought, wow, that looks good, let me try a less expensive product first.  The Royal Purple cushion is pretty thick, at least a couple inches, and I thought it would be really comfy, well, not so muck.  When you sit on it it doesn't stay thick, it just collapses down to a much thinner cushion and so....what's the point.  It doesn't feel any better than any other cushion, it fact I feel like a memory foam cushion would be more comfortable, although I have not tried this.  One thing that is really annoying, it has very small rubber dots on the bottom of the cushion's cover that are supposed to keep it from sliding on the chair.  It doesn't work!  Every time I slide my butt forward on the chair, the cushion comes with me and I am constantly pushing the whole cushion back onto the chair seat.  Another annoying thing, it costs 80 bucks!  Not worth it at all.
Rating: 2 stars