(Device: Sharp LCD TV / Pioneer DVD player / Desktop PC (DIY)
1. only PC / DVD player stays off = Switch switches to PC
2. only DVD player on / off = Switch PC remains switched on DVD players
3. only DVD player on / then PC = Switch switches to PC
4. only PC / DVD player to then = switch is not set to receive DVD player
So I had to at point 4 switch manually.
I place both units simultaneously, this point is negligible for me.
The optional HDMI cable that can be ordered for this switch, I have not ordered because of the poor reviews on this cable.
I use HDMI cable "BlueRigger".
1x 1m power switch for TV (2,95 Euro)
1x 7.5m Connecting the PC to switch (9,95 Euro)
1x 1m connecting DVD player to switch
Who the PC (with normal PC speakers) will connect to the TV, you should note that you must change the audio output on the PC to digital in order to receive a sound on TV. I have solved this with the file "rtkhdaud.dat". (Just google). So I have the same time to the standard and digital output a sound (Realtek Audio, Windows 7-64bit). So switching unnecessary.
Conclusion:
The switch is very convenient and reliable switching. It is small, can be well behind the TV hide. The sound and the image are compared to single port is not impacted. Because of negative statements in other reviews other HDMI cable used.
I am very pleased and would recommend to my mother this switch.