The primary advantage to the SS1 is combining 2 products into one to reduce the overall bulk and weight of your dive gear. The SS1 is only slightly larger than a standard BC inflator yet has a backup breathing regulator built-in. There is only one low-pressure hose from your first stage that feeds both the BC inflator and the backup regulator. A secondary advantage to the SS1 is its location. The SS1 is fixed to your BC and falls over the left shoulder. It remains there and is used throughout the dive to control buoyancy. Since the location is fixed and it is constantly being used, the diver becomes quickly accustomed to itsâ€™ location and is able to locate it easily in the event that air sharing is required.