I do like the armrest cover. It fits snugly onto the arm of the sofa and does not slip. It provides an extra layer of protection for the fabric. The armrest cover comes with twist pins. I decided not to use them so the covers could be quickly removed if needed and they still work just fine. 
The color is a bit off from the picture on the website. I chose the color camel. It appeared much lighter and not as orange tinted in the photo on the site.
However, I am still pleased with their performance.