I have several of them in the house. They work great.
There are a couple of different kinds. Some are powered all the time kind of like the bunches of USB ports on the computer that runs all the time. Some only turn the power onto them when you plug a cord in, some have small switches that you flip to turn the USB and yet others only supply power to the cord when a load is detected.
As for CF bulbs....got no use for them. They don't last any longer than a standard 60, they take forever to get bright, they can't handle the cold, can't handle being on a motion detector, most of them can't be on a dimmer and they are ten times as expensive as a 60 watt bulb.