Sorry for the delay 8) I was out for a week testing the HD2 on a trip 8)
I think it's worth the 2 quid they may cost.
It works better if you hold the phone in one hand and use the stylus with the other, when using the stylus having the hd2 sitting on a table it doesn't react well.
I use it with apps like TotalCommander which small windows style objects, and it does the job.
My magnificent drawing was done in paintbrush, the stylus wont work, the pointer is far too thick and been flat is nearly impossible to drag it through the screen. Still, as you can see, me + paintbrush + mouse is like Michelangelo plus a big dome and some paint 8)