I adored my Microsoft Natural Multimedia Keyboard. The space key stopped working after umpteen years and I had to abandon it. For some people these are garbage; for some people they relieve pain. That keyboard and a huge trackball (Kensington Expert Mouse) kept me from having hand surgery - the surgeon suggested that I try ergonomic entry devices for a while before having the work done.
I did find that the NMM Keyboard helped me learn touch-typing easier.
If it was up to me I would have got MS to design a keyboard which has LEDs under the keys and you can change the entire layout of the board with the flick of a switch to a different QWERTY layout. To test all the different system layouts for whichever suits you. It would have suited those of us who have PC`s that need two systems of input.
e.g. My wife uses Japanese Kanji, Japanese Hiragana and Japanese Katakana (and Romanji).
One Keyboard for all countries.
Dial in an input.