I know £30+ may seem a lot to pay for a mouse but this mouse does have features not found on most mice (like being able to be used on glass surfaces). It sounds like it is better than my Logitech Nano mouse so it should be good. I saw this on Play in their sale but it looks like Amazon have price matched (it was £39.99 on Amazon) so for most if would be better to buy from Amazon as their customer service is vastly superior.
Some great reviews here :http://www.testfreaks.co.uk/mice/logitech-anywhere-mouse-mx/
The Logitech Anywhere Mouse MX works wherever you do. Thanks to Logitech Darkfield Laser Tracking, you'll get precise cursor control on virtually any surface, even glass tables (4 mm minimum thickness) where optical and standard laser mice fail. You can take it anywhere thanks to its compact size. The tiny Logitech Unifying receiver is small enough to leave in your notebook.
Anywhere you go, you'll get things done more comfortably with its sculpted design. You get hyper-fast scrolling to fly through long documents and Web pages with a single spin of the scroll wheel. Plus thumb buttons let you go back and forth between Web pages with just a click.
Logitech Darkfield Laser Tracking gives you precise cursor control on virtually any surface, even glass tables (4 mm minimum thickness) where optical and standard laser mice fail.
The tiny Logitech Unifying receiver stays in your notebook. There's no need to unplug it when you move around, so there's less worry of it being broken or lost. And you can easily add compatible wireless mice and keyboards to the same wireless receiver.
Take it anywhere thanks to its compact size. And its sculpted design comfortably fits your fingers.
Hyper-fast scrolling lets you fly through long documents and Web pages with a single spin of a nearly frictionless scroll wheel.
You'll be able to quickly go back or forward in Web pages with a click of a thumb button.