The button in the middle does not bother us as in some of the other reviews.  I can't speak to their performance because we haven't used them much yet.  I was pleased however that they fit into two distinctively different chair sizes.  First pic of the swivel chair with larger seat base.  Second & third pic of smaller stationary chair with smaller base (approx 17" x 17" base).
Rug in pic 1 also from WayFair - Jalissa Floral Blue/Green/Orange by Sol 72 Outdoor
Pineapple pillow also from WayFair - Abid Pineapple Indoor/Outdoor by Bayou Breeze
They all go very well together and pair well with some existing Sunbrella cushions