Bests & Worsts Reviews from Amazon

I bought this mouse because i have wrist and lower arm pain. I can't actively use any regular mouse more than 1h at a time, without getting some pain. Made the switch to a trackball mouse (logitech M570), which was an improvement, but i still had some pains, from the wrist angle (which was not much different from a regular mouse) and from the tendon that belongs to the thumb (since the thumb does all the hard work on this particular mouse). And besides, cleaning the ball every now and then became a chore and it wasn't that precise (esp for games). So i wanted something else, and since only vertical mice were left to try, i bought this one, since it had positive reviews and looked good from the pictures. The good: + it's comfortable, and this is the most important thing, because so far i can use it for hours and don't have any pains. The wrist isn't twisted like on a regular mouse and i can feel this, for the better. Took me under a day to get adjusted to this angle. An interesting thing about this design is that you feel more inclined to use your whole arm to make mouse movements, which is a good thing, since doing so puts less stress on the wrist. This goes well with the lowest dpi setting, at least in my case. + i love the placement of the back and forward buttons, on the top of the thumb, where i can access them easily. + the construction is very good, on par with much expensive mice (Logitech, Razer -which i've used in the past, since i'm also a gamer). The plastic doesn't cracks when i apply pressure, it's as solid as it can be. But it's also light, for a wireless mouse (i've had heavier, from Logitech). The paint is a silky rubbery stuff, like the paint on Razer mice and some Logitechs. We shall see how much it lasts without peeling (a problem which i had with one Razer mouse). + the buttons don't wobble and the clicks are solid (maybe too solid). + the tracking is incredible, i've tried everything from bed sheets, blanket, jeans to wood and rubbery plastic, it tracked without issues. Only on glass it didn't work, but that's expected. Impressive. + it has 3 DPI settings and one blue LED that blinks for every dpi setting. + the mouse scroll wheel is pretty good, doesn't wobble much and is relatively quiet. + it looks very good on the desk, very stylish, modern design. All other vertical mice that i've seen looked like something from the '90s. + the battery life is very good, used it heavily for a week and still works. Works with 2 AAA batteries (not included), i've used two rechargeable Eneloops in mine. No problems. + fits well in my average man hand (i have 7.5" measured from wrist to the tip of my middle finger). + the wireless works good, even from 7-8 feet (i use it plugged in the back of my desktop pc, but i can move it to the front, if needed). I don't feel any input lag from the connection, so i can also use it for games (a big plus for me). If you have problems with the reception, you could try another USB port or move it closer, with a usb extension cable. Not needed in my case, but wireless can be tricky in some configurations. YMMV. The bad: - also the general size is good for my hand, my pinky remains on the mouse pad if my hand is relaxed. It has room to sit, barely, but only if i grab the mouse completely and firmly. If not, it drags on the mouse pad. I really wish the mouse shape had a support there for the pinky finger. I can get used to it, but it's an annoyance nonetheless. - the clicks require more force than needed, especially for a mouse that's designed to alleviate RSI and such. The middle scroll button is even harder to press. Mind you, this isn't something out of the ordinary in the computer mice world, but for an ergonomic mouse, this should be fixed (at least the middle scroll button). Other thoughts: Be careful when you move your hand to grab the mouse, coming from the keyboard area. Since it's much taller than a regular mouse, you risk hitting it by accident and throwing it on the floor. The funny thing is this requires more time to adjust than it takes to adjust to the vertical shape. The mouse enters a sleep mode after a period of 4-7 minutes of inactivity. You need to press a button to wake it up. Moving it around won't work. Doesn't bothers me, but you should know this. 1 year later UPDATE: it held up well, the rubbery paint is still intact (though it attracts oily fingerprints) and everything else is ok. Also, though i've said i'm a gamer, i didn't said i'm a pro gamer. But as i mentioned earlier, i don't notice any input lag with its wireless reception, but the lift off distance of the sensor is a bit higher than on other gaming mice i had; this may or may not bother you. If you don't know what lift off distance is, then don't worry about it. :)