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Evoluent VerticalMouse 2
With its upright stance, Evoluent's VerticalMouse 2 attempts to create an ergonomically advanced and comfortable mouse. A regular mouse requires the palm to face down and causes your forearm to twist, but by keeping your hand in a neutral upright position (much like a handshake), the VerticalMouse 2 eliminates forearm twisting, which is a possible cause of repetitive stress injuries (RSI). The right-handed model can be had for around $70, while the left-handed model costs a whopping $30 more--for no apparent reason. On paper, the VerticalMouse 2 looks like a viable solution for those suffering from RSI, but don't toss out your traditional mouse just yet. The VerticalMouse 2's drawbacks make it far from the ultimate in comfort or functionality.
Although it may be ergonomically correct, this mouse's upright form takes some getting used to. The left side of the mouse has a concave area where your thumb falls, but on the other side of the mouse, the rest of your hand must fight gravity to stay upright. This lack of support leaves the side of your hand dragging as you move the mouse--something we grew tired of quickly. The VerticalMouse 2 has three main buttons and a scrollwheel on the right side. A button on the left side--just above the thumb rest--is intelligently placed. The scrollwheel, which also functions as a button, is smooth--which we like--but gamers and others may prefer the tactile response of a clicking scrollwheel.
Unfortunately, we encountered a problem with this mouse that we've never seen before: the rubber around the scrollwheel separated from the wheel and nearly jammed up our test unit. This design flaw could prove to be a major problem, as we had to pry up one of the mouse buttons to recover the loose rubber and replace it on the wheel. The buttons themselves require only a very light touch, which makes them slightly more prone to accidental hitting. Four of the five buttons are programmable when used in conjunction with Microsoft Windows operating systems and the VerticalMouse Manager Software, but the left-click button (actually the top button, in this case) isn't programmable.