I love these wrist rests but if you wear a metal watch band be careful because it will snag the surface and exposed the gel. Mine now has duct tape patches but I still like it better then the lycra covered rests.
My friend broke her arm and wore her hand in a sling. The doctor said she could let her arm dangle but when she tried to use the keyboard her upper arm hurt. The wrist rest lets her put the weight of her arm on it instead of the muscles to hold it up and she can type freely. She is thrilled!
I bought this for my son who has problems with his joints particularly with his wrists. He told me it has eliminated the pain and eventual swelling. A great product.