This is so easy to use and looks great - very smart.
You just leave the remotes lying on the charger (which can be separated if you only want to charge two remotes) and they recharge by magic (it's actually by induction)! The lights light red whilst charging and blue when done - simple. There's an on/off switch on the charger, which works directly from the mains, so you don't need to have the Wii console switched on.
The only criticism we have is that the charged batteries last nowhere near as long as a pair of AA non-rechargeable batteries or even a pair of normal rechargeables, so beware. This isn't a problem unless you play for a long time all at once (we haven't worked out exactly how long before the battery goes, but we manage to get through a decent go at Dance Junior with the children, and we're worn out before the batteries are)or unless you don't want to put the remotes on the charger after each time you play. I'm not sure if the battery capacity will increase once charged a few times (or if the opposite will happen).
The limited battery life is the only flaw, but might be considered significant by some hence the 3 star rating. A pity because it really does look the business (and many will live with the battery life for this reason).