No problems with our 360's, two different DVD players and Telewest TV drive boxes using HDMI, or Component. All work fine.
My channel button flicks through Ext1 (RGB Scart 1), Ext 2 (Scart) then Component, HDMI and finally PC. But it only selects the two HD connections if something is plugged in otherwise it will just bypass them completely.
So usually I will press the channel button a couple of times, then press the "X" button and my 360 comes on and there it is on screen.
With the PS3 we pressed the channel button and were like "where the feck is HDMI"?!?! We got round the back checking all the connections but couldn't figure it out. Then we realised it only lets us select it when the PS3 is turn on but not in standby. Granted it is no big deal but just incase anyone else has a major panic when it seems their PS3 ain't connected I thought I would mention it!
We have very common Samsung LCD's, one of the best selling funnily enough which just like the PS2 means they must be the best!:rasp:
Actually they did get very good reviews although newer models are out now.