I’ve gotten rather accustomed to using my Wacom pen tablet I picked up a number of years ago for photo editing and design work at home, but think this Comfortable Pen Mouse by Genius would be a great tool to have for the computer at my office.
It’s said to work on any surface and have a pretty precise sensor. Not needing a special tablet makes its portability huge! You can order one here with free shipping!! Let me know how you use it.