I've been using it in the US for several weeks due to the lame Microsoft guide for digital channels, i.e. no PBS or subchannels in the guide. It works great but zap2it is somewhat unreliable. Every so often it drops all the digital stations from my configuration and I have to go onto their website and reset things.
You'll also need Microsoft .NET 2.0 and XMLTV.
I now have a perfect digital station guide listing showing PBS and subchannels.
I cant say it was exactly easy to set up, but I managed to do it.
dickm