Pretty Decent!
This chair pad really helps my toosh feel better when I have to sit for long periods.  The only negative thing I can say about it is that I have to adjust it all the time.  It tends to slide forward a lot.  I don't know how.  The bottom of the cover has rubbery grips on it, and it's on a padded office chair.  Even though this chair pad is sort of expensive, I consider it a worthwhile expense.  It smelled for the first 4 or 5 days after I got it, but the smell faded.
Rating: 4 stars