Thanks folks, for the wonderful, informative posts. I have been travelling the last few days and have been remiss in keeping up with this thread. Good to know that the cheaper versions have pressure sensitivity. And I was very interested to learn that there is a pressure-sensitive 'mouse mode' where the exact position of the pen doesn't matter. I'll try that and see how I like it.

Re charging the batteries on the wireless tablet - you plug the tablet into the computer via a USB cable to charge it. It seems the computer has to be active for this to work, ie not in sleep mode.

I haven't used the touch capabilities much at all yet so I will try that.

Thanks again for the great replies.