Review on Controller Anti Slip Protector Dustproof Playstation by Shelly Rozendaal

Highly recommended, great grip. The chopstick rests fit well and are comfortable to the touch. The only criticism is that there isn't much space on the side of the keys, there is no "natural" feeling when pressing the keys. Forces you to look at the controller to be sure what you're touching. Update: With the skin on, the controller no longer sits on the charging dock as shown in the second image.