I work in technology and programming , so I use my keyboard all of the time . so much that I be have `` repetative stress '' problem -lrb- basically , tendonitis in my hand and wrist -rrb- .  so I buy the m natural keyboard . I type over 80 word a minute but do not have much trouble get use to the new key arrangement -- which be still a qwerty design , just on a angle . not only be the arrangement more comfortable , but the action on the keyboard be about the best I have use : full range of motion , appropriate key resistance . overall , the keyboard be the fastest , most comfortable I have ever work on . in 6 year , I have not have any tendonitis problem with this keyboard -lrb- but do have they when I be force to use a regular keyboard for too long -rrb- .  I be at Amazon today to buy a third one -- I have have to give up the old one with each outdated pc .  Hope this help !