I must say that my work is otherwise already quite ergonomically. My arms are bent at the level of the table surface, and I can hang up the arm incl. Elbows on the table. As I said also I use a gel pad for the wrist.
I have now bought 2 items: The Evoluent Vertical Mouse 4 Small and precisely the "Logitech Marble Mouse". Both go to the problem slightly differently. While the Vertical Mouse is hoping to allow a natural posture of the arm by the mouse buttons are not positioned horizontally but vertically, the Marble Mouse avoids the movement of the mouse with the wrist because it is controlled by a trackball.
Logitech is also a "normal" trackball mouse with mouse buttons and mouse wheel right and left trackball. I find the use of the trackball with your thumb but not so great and
At first I thought it would be very gewöhnunsbedürftig to work with the trackball. After a short but it works very well and also very accurate. I have to set the sensitivity right in the middle, and the acceleration to "high". This one comes very quickly anywhere on the screen, but can also work very accurately when you move the trackball slowly.
The processing of the mouse I find ok, but it is not super high. The pity is that the 3 beads on which the trackball rests, are only made of plastic and not made of steel. That would ease the certainly increased. The trackball can also move quite well. For cleaning you can remove it.
The cable is quite long, a wireless version would of course practical. However, the cable does not bother, because you do not move the mouse itself.
The 2 main mouse buttons are large and easy to operate. The 2 additional keys are much too small, stiff and not very well positioned.
The main problem is the lack of a scroll wheel, which is very often needs today. However, just a traditional scroll wheel for "mouse arm" absolute poison, especially if the wheel is quite stiff.
The scroll features the SetPoint software ("Universal Scroll") are I do not use to. But there is a free software that works better ([...] Unfortunately, this software is on the no additional buttons instructed positioned as I said much too sluggish and wrong to keep them easily depressed. But I have a solution for it found that I describe in my forum post (bottom of the page).
I have my gel wrist rest now positioned exactly the way at the end of the mouse (without the rubber backing), so I can lay hands on the mouse and use well.
Here again briefly summarized:
Benefits:
- Relatively inexpensive (eg compared to the Evoluent Vertical Mouse)
- Trackball works well (but could still roll a little easier)
- Suitable for left-handers and right-handers
- Looks very chic
Disadvantages:
- Additional buttons can be used badly
- Scrolling the trackball useful only possible with additional software
- No wireless version
