I’ve tried many mice for my notebook, and the best most comfortable tiny mouse, for travel or stationary use, is the Microsoft Wireless Notebook Optical Mouse. It’s as fast as a wired mouse; there’s no lag. Maybe you don’t want a mouse that requires a battery since it could leave you stranded, but the battery lasts a few months (I use mine daily), the USB adapter snaps into the bottom turning off the power when traveling to save battery life. It’s snappy, very responsive, accurate.
A cool tool is anything useful that is superior to comparable items. If you think this tool is inferior suggest a better one. You are welcome to insult a tool, but comments containing insults to individual people will be deleted. Corrections of fact are always welcomed, if stated politely. Recommendations of better tools are dearly wanted and may be elevated to the front page.