This docking station give a tidy place to store your controllers. Plus charges the controllers when the PS3 is switched on. This works fine for me, as one controller can be charged when playing 1 player games. ie one controler is left in the docking station. Also I have the bluetooth remote control, so when watching films or downloading demos etc. both controllers are kept topped up.
As for comments about the flashing lights, well this is optional. Simply press the button on the docking station and they can be on or off, but the controllers still charge in either state...
Another advantage is this is a tidy solution, so the wire can be hidden permanently and just have the docking station available for storing and charging the controllers.
Rather than having a loose USB cable and no where tidy to place the controllers when charging..
Finally this station means two controllers get charged off one USB port, so if like me, you have a 40Gb PS3 and you only have 2 USB ports, this is great.