At a Glance
The Good: Micro-precise scrolling, attractive designs, Unifying Technology
The Bad: No ergonomic curves
Design and Construction
The M325 comes in an incredible number of different designs. There are solid color options are as well as designs that are part of Logitech's Global Graffiti Collection of artist-created patterns. The mouse is on the smaller side - those with smaller hands would appreciate it, and it would make a fine travel mouse. The patterns are featured on a glossy faceplate while the rest of the mouse is a matte black. It's an ambidextrous mouse, so both righties and lefties can rejoice. The downside to this is that the mouse has few ergonomic curves to it, so heavy computer users may wish to look elsewhere.
Scrolling and Performance
While this mouse doesn't feature Hyper-fast scrolling, it does come with what Logitech calls "Micro-precise scrolling." The technical differences between the two are a bit unclear, but one thing is certain: The M325 scrolls extraordinarily smoothly. It has almost imperceptible detent scrolling, which is actually a bit nicer than the typical smooth-as-glass scrolling found with Hyper-fast.
I love Hyper-fast scrolling. It can take some getting used to in order to use it to its full potential, but once you master its finer points, you'll have a hard time going back. To be sure, it's especially fun for certain types of users, and this would include Microsoft Excel users.
I may appreciate Micro-precise scrolling even a bit more because I really did enjoy the slight detent scrolling. To demonstrate: In a blank Excel document, one fast-as-can-be scroll using the Logitech M310 mouse brought me to line 73. Using the M325 brought me all the way to line 879. There's really just no comparison.
It clicked and dragged very cleanly; the small mouse has a comfortable bit of heft to it. It is an optical wireless mouse. (Read this article to find out the difference between optical and laser mice.)
There is quite a bit of customization that can be done with this mouse. While the left and right buttons can only be used to left and right click, you can designate the scroll wheel for a variety of functions: : middle button, zoom, application switcher, auto scroll, universal scroll, play/pause, mute, keystroke assignment, and other.
And while that's where the customization ends with the M310, you can also tilt the scroll wheel of the M325 so that it operates forward and back buttons. Or you can set the "Back" button (tilting the scroll wheel left) so that it's designated as page down, cruise down, zoom out, next, volume down, keystroke assignment, or other. The "Forward" button (right tilt of the scroll wheel) can also be designated as page up, cruise up, zoom in, previous, volume up, keystroke assignment, or other. There is really a lot of potential for this simple mouse.
In addition to the button assignments, you can also adjust the pointer options and determine how many lines you'd like the mouse to scroll. Options include one line, three lines, six lines and screen. This menu will also let you access the Unifying Technology options (keep reading for more on that feature) as well as designate gaming settings.
To access these options, click on the upward-pointing arrow in your taskbar, which is located on the bottom right-hand side, right near the clock. A little mouse and keyboard icon will display the battery status of your Logitech peripherals (a really neat feature, especially since the mouse doesn't have a battery status indicator on it). If you click on that icon, you will be given the Mouse and Keyboard Settings option. Click on that, and you'll be taken to the menu that lets you adjust button and pointer settings.
Battery life is said to be 18 months, although this can vary depending on "user and computing conditions," according to Logitech. It uses a single AA battery. The M310, meanwhile, boasts just 12 months of battery life.
Like many of Logitech's mice, the M325 uses the company's Unifying Technology. This allows you to pair up to six compatible devices using just a single nano USB receiver. Not only is this beneficial if you're already using a Logitech keyboard or touchpad, it can also help if you have multiple people using the same computer but who prefer to use different mice. No more swapping out (and potentially losing) nano receivers.
What should do with the extra receivers? Logitech has some ideas (well, one idea). Thankfully, the M325 has a receiver placeholder beneath the battery cover. This, along with its smaller size, makes it a viable travel option.
The Bottom Line
The M325 might retail a bit more than your average travel-sized mouse, but it packs in a great deal of features that make it worth its pennies. The Micro-precise scrolling is fun and helpful to use, and its attractive designs are just icing on the cake. Yes, it would be nice if it was a bit more ergonomic friendly, but that's the price you pay with an ambidextrous mouse.