The lighting of the blue LEDs of the two jacks is really strong. They light up as soon as the plug is connected to the PC (and turned on).
This is also an important point for me. After several paused (on a seven x64) my USB ports do not work anymore, I have to restart. The I automatically know when this is the case.
Also handy when you are in 4 legs in a dimly lit office, try to plug a usb plug in the middle of other, you know right away if it is properly connected.