Actually did buy one of these a couple of days ago, and as we are now back in the UK just trying it out. It seems to work ok (at least on XP, didn't seem to work on Vista).
Was a bit of a joke trying to buy one as the guy in the Smart Wireless Center in Bacolod claimed they wouldn't work abroad (didn't have time to argue with him...) and the Smart Wireless Center in Rockwell Center, Makati didn't have any stock, so ended up going to the Smart Tower.
