"I really like the Goldtouch GO. I find its value is the ability to adjust it to my most comfortable typing position (the ball and lever are pretty cool) and of course, the portability (it fits in my satchel bag with my Thinkpad). These are the two primary reasons I recommend it so highly.
It's travelled with me over 30k miles in six countries in the last thirty days and is one of the most comfortable travel keyboards I've ever owned - and I've owned a few. Highly recommended."