These cushions are quite comfortable and stay put fairly well due to the center tie straps.  The downsides however are problematic, the most concerning being the dye from the material leached into the towels we put down from just a few hours of use (and perspiration).  If that happened with a towel, what’s happening to your skin when you’re not using one?  My other complaint, albeit a minor one, is the center tie-downs could be a bit longer.

Word to the wise: If you do purchase these, keep the foam inserts inside their plastic shipping bags when you install them in the covers even though the directions say to take them out.  If it rains and the cushions get wet, the shipping bags will keep the foam from getting soaked and the cushions will dry MUCH faster.