The auto-switching function of the unit failed after less than one day of having it. It seems that the problem may be that the unit senses stand-by power of a particular device and will not auto-switch to the device you have actually turned on. So if you have an XBOX 360, Blu-ray player, upscaling DVD player, SKY HD etc. all of which stand-by, you can see that problems will be created.
You have to go behind your TV and press the manual switch button which takes away half the attraction of an auto-switch.
It does, however, extend one HDMI port into three.