\n[rating: 4.5]\nPros: \n\n \timproved design\n \texcellent tracking\n \tsmoothest mouse to date\n\n Cons: \n\n \tambidextrous design not for everyone.\n\nAmbidextrous mice have a bad habit of being equally uncomfortable for both right- and left-handed people. It\u2019s a trait they all suffer from, one which shows unrelenting equality towards the population. But they don\u2019t have to. Instead of being equally uncomfortable, they can be better made and fit anyone, regardless of hand preference. The best gaming mouse is always comfortable and easy to use.\nThe Razer Lachesis is the first to accomplish this.\n\n\nThe updated Lachesis is not a daring mouse by any means. The original first arrived nearly three years ago, and when I tested it then, I found it to be a formidable mouse. Thereafter, I rarely used it, opting for non-ambidextrous mice. As mentioned above, my hand desired a sense of personalization that the Lachesis lacked. Thanks to the Lachesis\u2019 political correctness, I found myself more inclined towards side-oriented mice.\n\nOther ambidextrous mice came and went, receiving similar treatment. But this updated version is a real treat. It\u2019s contoured shape and design doesn\u2019t leave my hand feeling alien to the mouse. The fit isn\u2019t perfect, and that won\u2019t change until shape-shifting mice come about, but it still seats the hand well, especially for claw-gripped gamers.\n\nThe Lachesis, next to Alienware\u2019s TactX and Logitech\u2019s G700\nRelated: Also check out our Razer Imperator Mass Effect Edition review.\n\nDid something change? Yes, slight adjustments, tweaks that provide minor improvements to the original design. It may just as well be me getting older. One or two fingers rest off the mouse, which can be a killer for some gamers, who fling their mice across giant mousepads at top speed. The thick body and lowered top make for a surprisingly comfortable design, easy to rest on without keeping wrists at an awkward position. The design works well for an ambidextrous mouse, and as a right-handed person, I was equally comfortable using the Lachesis with both hands. Not that I do so regularly.\n\nWith a glowing tri-headed serpent and scroll wheel, the Lachesis is similar to other Razer mice in design and precision. When moving the mouse, it feels on the screen very precise, and deliberately so. Other mice I\u2019ve tested feel normal \u2013 they track at the same speeds, and flutter about at times, but are consistent in doing so. The Lachesis, on the other hand, feels more akin to watching a movie on a 240Hz display. It\u2019s super smooth. But unlike Transformers at 240 frames per second, the Lachesis doesn\u2019t feel slow or odd. It feels great, a step above the competition.\n\nRelated: Read our Razer Taipan review if you want to see how this mouse compares to others.\n\nFor most users, this won\u2019t make a difference. Tracking, so long as it\u2019s precise 99% of the time, is good enough. I can\u2019t attest to the Lachesis being more precise than competing mice, though it certainly feels that way. But there is a difference when just moving the mouse across a screen, and seeing it jitter between pixels as mice normally do, versus gliding smoothly and elegantly as the Lachesis does. Games feel better, general computing feels better\u2026 it\u2019s a smoother experience.\n\n\n\nWith up to 5600Dpi, which is a crazy setting to do anything at (actually, anything above 3000Dpi is ridiculous except on multiple 24+\u201d screens), the Lachesis nearly reaches the current max (which is 5700Dpi\u2026big difference). It doesn\u2019t include any special bells or whistles, just the standard five button design plus two alternate-side buttons (for lefties, of course, and all four thumb buttons are programmable). The scroll wheel is tight, and feels rubbery, a Razer design choice, compared to a more mechanical, clicky feel that mice from Logitech and others have. I personally love the frictionless scroll wheels found on many Logitech mice, as well as Alienware\u2019s TactX, and always miss it when testing mice without it. The Lachesis is no different in this regard, so it would be great to see such an addition to Razer\u2019s line.\n\nProfessional gamers will be more than tickled by the updated Lachesis, especially lefties. At $80, the Lachesis comes at a relatively steep price, though not compared to similar mice. For an ambidextrous design with a top-notch laser and the best tracking on the planet, this is a great deal. Of course, the dealbreaker comes when you ask whether the dual-handed design is right for you or not. Still, it\u2019s safe to say that until the competition can track this good, the Lachesis is king.