DXT02W Ergonomically Designed Rechargeable Wireless Precision Mouse

I used to have the non-wireless version of this mouse; when it packed up, I thought I'd try the wireless version. Big mistake.Good points: both mice really do help relieve arm/shoulder/wrist pain. So fantastic for that.Bad point: unlike the non-wireless version, this mouse has REALLY poor control when copying and pasting. Over and over again, I get part way through highlighting a block of text to copy and paste and the mouse suddenly "conks out". If I'm not careful, it then moves my text about for me! Very dangerous unless you're careful. To keep control, I have to press down very hard on the buttons; even then, I often need 2-3 attempts to copy and paste a large amount of text.Very annoying as I copy and paste a lot.But, ergonomically, it's great.

It kinda mostly works.But the cursor doesn't move where you'd expect it to.For the cost, I expect a lot better.All the pictures, and videos [...] [...] show the mouse being used at something like a 45 degree angle, which looks ergonomic.What isn't shown, is that those mouse movements don't translate into horizontal and vertical cursor movements.- Slide the mouse along it's long axis for up and down.- Along its short axis for left to right.Hold it at 45 degrees (as shown in the marketing), and hand movements do _not_ intuitively map to cursor movements.Moving the mouse:- "away from you" on a mouse pad causes the cursor to move diagonally, towards screen top-left.- "towards you"; cursor moves diagonally towards bottom right.- "to the right"; cursor moves diagonally to bottom right.- "to the left"; cursor moves diagonally to top left.This is awesomely non-ergonomic.What it needs is a layer in the software, to do conversion.With a control panel setup entry, to set preferred usage angle, (for left and right hand usage, seperately), such that "17 pixels left and 15 pixels up" of mouse dimension movements are converted to "15 pixels up" of cursor movement.Depressingly ill-thought out design.- It's really difficult to tell if my fingers are on the right area of the buttons, particularly the bottom button, to press to click. Most of the time, I press and have my finger in the wrong place, and don't get a click, and have to look to see where the correct part of the button is. Pretty anti-ergonomic. (This is because the pivot for the button is too close to the "press" area. Bad design.)- It just stops working, completely, with absolutely no warning when it needs recharging, which is annoying and unhelpful. Again, for the price, I expect better. For example, an e-ink display to show remaining battery charge.- The battery is Nimh technology, which suffers from memory effect: if you recharge it before it's completely empty, the recharge capacity drops for the future. For the price charged, the battery should be Lithium Ion, which doesn't have that issue.The same day this arrived, I also received an Accuratus 2 Upright Mouse, for £13.40.The Accuratus 2 Upright Mouse behaves as you'd expect: move the mouse away, the cursor moves up, etc.Admittedly, the Accuratus mouse is right-hand only..But? £87 extra, for something that really doesn't work as well?You'd have to be fairly dim to buy the DXT mouse.Update: 2019: nothing has changed, with this mouse. It doesn't have Li-ion batteries, nor a drop-in charger base, it _still_ uses a stupid USB dongle that gets in the way, instead of being bluetooth. It doesn't fold flat to go in my laptop bag. And, it still sues stupid "stick-on" mouse feet, that just fall off, when the glue gets tired. Check out any credible mouse, these days? The feet are moulded in, part of the construction, and aren't going to fall off in a couple of months. Shows no commitment to engineering excellence? This company is coasting, i.e. gliding downhill.

The scroll-wheel turned unusable after some month. What happens is that on some "clicks", as you scroll, it goes in the opposite direction of the direction you are scrolling and/or doesn't register the scroll at all. Sometimes I find myself actually going more in the other direction of the one I'm scrolling! This makes it unusable and extremely unhandy at best for many activities. Playing games or working with programs that require lots of scrolling with any degree of success is impossible with this mouse because of this. Say goodbye to scrolling through e-books and on internet pages also. A very unfortunate flaw.The right-click button is a bit loose and flaps around slightly, and requires quite a lot of force to just press down. To avoid moving the entire mouse and pointer when clicking it you need to reciprocate the force equally with the thumb. Because of this I find myself tensing my thumb more than I want to at times. I have rather strong hands so I can imagine it'd be even worse for someone with hands of average strength. I find this also quite unfortunate.It also seems like the sensor is messing up. I find that the mouse stutters/barely responds at times, and when that happens it only stops when I lift the mouse up and reposition it. No other computer mouse I have have this problem, so it's not a problem with the surface. This is also very unfortunate. That the sensor remains sensitive is of course crucial for usability.Other than that, the design works I guess. It's much more comfortable than a regular mouse, and doesn't put as much, if any, stress on the extensors of your fingers-at least in my case.However, as far as the design goes, I would change the placement of the buttons so both buttons are closer to the bottom/table, and so there is no curvature going upwards at the sides. My fingers are quite small so, to reach the buttons (otherwise my index and middle finger will both rest on the table pressing against the right click button), I have to either hold my hand more vertically by force (very non-ergonomic, of course, as it puts a LOT of stress on the extensors-the problem which this mouse seeks to undo!) to bring the fingers up, or put my hand more vertical (like holding a glass) and get my ring and little finger between the table and my middle finger as to support my middle and index finger to reach the buttons, or hold the mouse in a way so I click with the intermediate phalanx of my index and middle finger. I find myself doing the last one.I would give it 4 stars if it weren't for the product defects-which didn't manifest until several weeks after the purchase. I find it especially annoying in regards to the ridiculously high price. I would've thought that the quality would be great at such a price, but I guess not. If you want to see quality mouse, look at Logitech Mx Master. It's almost half the price yet it doesn't have any defects like this. It works as a computer mouse should. These defects really take down its usability and I find myself annoyingly switching between my normal computer mouse (Mx Master) or Logitech trackball mouse in situations where I can't use this one.The final verdict is 2-stars simply because it's more comfortable than a regular mouse anyway. However, I would buy another vertical-styled mouse if I were to choose again.