Just received this and given it a quick run on an XP system. Seems to work well but it is missing the '\' (backslash) and '|' (pipe) chars, usually on the key to the left of the Z key on a UK keyboard. I was expecting this as it has been mentioned on reviews of same/similar products.
For everyone else's info, you can generate these chars in Windows by holding down the Alt key and typing the char ASCII code on the num pad (not the main k/b numbers). Ensure num-lock is on. So:
'|' is ALT-124
'\' is ALT-92
Otherwise its excellent and saves me having buy a USB keyboard when I'm working on someone else's system.