if you're planning to buy a mini keyboard in that price category, why don't you go for the Perixx periboard 703 or 704, it's a rf wireless mini multimedia keyboard with integrated trackbal, where the 703 has a mechanical trackball and the 704 has an optical one. especially nice when you're busy doing things and not want to bent over to touch the screen all the time, and it only costs 30 GBP for the 703 and 35 GBP for the 704
here's some info:
producers website perixx
the shop where I bought it: the cheapest I could find on the net. digitalpromo
you might like it.