Using a Split Keyboard
I've been using a split keyboard for quite a while--at least seven or eight years. Thinking back, prior to using split keyboards, at the end of the work day I always noticed that my wrists hurt a little--nothing serious, and not every day, but I was afraid it might turn into a serious problem. My Dad was already using a split keyboard so I tried it briefly and was sold. I bought them for home and work and the wrist strain disappeared.
Our notebook computer has a traditional straight keyboard design, but I don't really do any serious or significant amount of typing with that, so don't really have a problem with it.
A few weeks ago when I started my new job, I had a straight keyboard. At the end of the first day, I felt a little ache in my wrists and realized right away what the problem was. I wasn't comfortable with that keyboard and asked for a split-design replacement. Earlier this week I received it, and felt almost immediate relief. As the keyboards were swapped in the middle of the day, it was also very easy for me to notice that I could type much faster with the split keyboard!
I've used several makes and models in the past, but I'm currently using a two-year-old Microsoft design similar to the Natural Ergonomic 4000; at work I'm using a Belkin ErgoBoard. I definitely prefer the feel of the Microsoft board, for what it's worth. If you touch-type and want a more comfortable experience, I highly recommend a split-design keyboard. Newegg.com sells many different models--and it's well worth the $20-$30 price.