The Supernatural liner was much better than the one that come with the Oculus. It fits closer to the face and over the nose and does not flip up into your eyes like the original liner.
The controller cushions with the grips are great to keep them from flying out of your hand (okay, maybe just me) during an enthusiastic Flow session. They go on and off easily.
Lastly, the headband fits better with the headset than a terrycloth one did. It allows the mask to fit more snugly, keeps your hair (and not to be indelicate, sweat) out of your eyes.
Worth the purchase. Will likely purchase the add on liner kit and more headbands.