From the ergonomics keyboards contained in the offer made in my opinion after most successful layout with respect to the hand position. You can order by very fluently and fatigue write a short acclimatization, the keys do not rattle, the pad is comfortable. Unfortunately, the Return key is too small so that inexperienced writers will thus have their problems come. Why the Windows key is twice as large as that for writing more often used left Shift key, know very well only the Microsoft marketing department. The EMail- Button does not pre-set to the default mail program, but on a Microsoft web page. The calculator button is nice, but redundant, in principle, Finally, you do not want for any small application is an extra button which on top of that can not be reassigned without further notice. However, the most annoying is the mouse: While you have remedied the evils that the "Mouse arm" leading flat hand position, when Elle spoke up in permanent remain twisted posture, by laterally inclined handle leadership and high To avoid construction of the mouse body, this is the bearing surface of the mouse so small that the massive mouse body sideways wobble when moved. The high center of gravity of the mouse also makes it difficult to fine positioning. This mouse is therefore not a good solution, so the second point deduction.