This is an amazing accessory to have if you own more than the default two Joycons that come with a Nintendo Switch. I know I would find myself with dying Joycons if we didn't swap out which ones were docked to the side of the Switch regularly. The extra Joycons also didn't have a great place to live. This fixes both problems! I love the way it just extends the dock and uses the existing USB ports so it's not yet another thing sitting around. Very happy with this purchase.