Wanted a second one of these for a while for my secondary PC, but holding out for a price drop as it wasn't critical. Picked up the first one at a previous Currys/PC World deal for £54.99 I saw on here back in May which I though was an excellent price, so this is superb!
I'm sure everyone who knows of these mice knows what they are like - if not, here's Logitech's blurb:
Crafted for optimum comfort and response, the Logitech MX Master Wireless Darkfield Mouse offers comfortable and precise control.
The ergonomic design supports your hand and wrist in a comfortable, natural position for optimum comfort during use.
A Darkfield laser sensor delivers accurate tracking on virtually any surface, including glass and high-gloss surfaces.
With the speed-adaptive scroll wheel you'll be able to scroll through long documents and web pages quicker and easier.
The thumb wheel enables side-to-side scrolling with just a stroke of your thumb. The actions of the scroll wheels and buttons are fully customisable to suit you thanks to the downloadable Logitech Options software.
This wireless mouse uses dual connectivity for optimum performance – connect to your PC or Mac via the included Logitech Unifying Receiver or via Bluetooth Smart technology. You can pair up to three devices and easily switch between them at the touch of a button.
Free from trailing cables, the MX Master offers excellent versatility, ideal for use in the home or office. Recharging quickly, this wireless mouse provides up to 40 days of power from a full charge.