I would recommend this product to anyone who enjoys using the Wii Fit. My children play on the Wii Fit a lot and this battery is perfect. The battery can be used while plugged in or not plugged in, whatever is more convenient for your usage.
The only "disadvantage" was not reading the information packet before using the product. The on and off switch on the battery pack was confusing until I read the packet. So definitely read the packet first or at least skim it, the packet is very short.