Before testing the Lachesis on the virtual battlegrounds, we first tried it on regular work-related tasks. That was when we discovered a serious problem: even with the much vaunted high precision and all other bells and whistles, the pointer used to slide a little off course when the mouse was left to its own devices. Plus it kept on missing icons and clicking over the wrong commands because of that millimeter slide. It was not that a big deal but we ended up opening a wrong file because of that. With the whole technology behind the Lachesis, it’s an inexcusable mistake. We changed the surface beneath the mouse (we were using a gaming-grade mouse pad from Razer itself, the Destructor, already tested by us) and altered some of the sensitivity but the issue continued, to a minor degree. Just as we were typing this review, we saw the pointer moving on its own even though the Lachesis is resting untouched by the keyboard’s side.

As we proceed to play Team Fortress 2 (same map and server, as always), we noticed the sniper’s scope leaning a little off center in key moments. We missed a couple of shots and ended up dead because of it. Frustration took hold of us until we tried to compensate changing the DPI setting and trying to improve the grip on the mouse. It still wasn’t as precise and steady as it should have been. During intense shootouts and running action, the Lachesis delivered with the high sensitivity it advertises. But ergonomically it’s not a good mouse: the broad Y-shaped head and the large and high backside don’t make for a steady grip like, for instance, the leaner body shape of the NZXT Avatar, for instance.

In final analysis, besides all the highly laudable attributes, the Lachesis didn’t deliver the excellent performance we were expecting on account of Razer’s curriculum. It’s not a bad gaming-grade mouse per se, but what we observed during gameplay and work tasks shouldn’t have happened.