The accessories range from nice (a silicone cover, yoga mat, and Balance Board carrying case) to filler (socks!) to potentially harmful (a battery pack). That battery pack puts the whole thing on shaky ground -- ever since the Psyclone Wiimote charger fiasco, we've been wary of off-brand chargers. If you really want one, the Nyko option seems safer.
Honestly, if not for that, and the higher price Dreamgear expects because of it, a multi-Wii Fit accessory pack wouldn't be a bad idea. A cover is a good idea for anything you're going to put your feet on while sweating, and the bag and yoga mat are useful.
Gallery: Wii Fit
[Via Balance Board Blog]
