In fact this mouse is a development of a previous model, the MX400, a mouse we liked for its value for money. With the new scroll, this M500 is even better!
First nice surprise: the materials used!You can't tell from the photo but the left and right hand sides of the mouse aren't in rigid plastic but rather in rubber. This allows you to get a really good grip on the mouse, though your fingers do sweat a little.
On the top, the plastic isn't completely smooth but slightly grainy, which is something that we appreciate, handling-wise.
A free scroll or with notches, your choiceAlthough in the past, on some models, you activated this via the scroll itself, here Logitech has gone for a more economical solution: a button behind the scroll. If you don't know this feature, don't think it's a gadget: it's extremely practical and definitely a plus for Logitech over the competition. If the scroll is on notch at the start, clicking on this button releases it for completely unrestricted movement which is much faster and more fluid on long web/office doc pages. It's very simple and natural to move between these modes.
This is a corded model and this will appeal to those who don't want to spend out on batteries, or bother with recharging - even if manufacturers have made a good deal of progress here with battery life that now extends to several months on the Logitech Marathon Mouse M705 for example. The cord is light here and doesn't affect the movement of the mouse. Above and beyond the cord, the mouse itself is very light: 117 grammes.