Decent but not big enough
It appears I should have gotten the largest cushion.  I got the second largest and it cuts at mid-thigh.  Too expensive to return, so stuck with what I got.  It's smaller than it sounds like from the measurements, even though I compared it to my chair and thought it had plenty of room.  I'm 6' 1", so if you're tall - get the biggest one.
Rating: 4 stars