I have used this style for years and never had any problems with my wrists. It is a natural position, easy to use and very comfortable. Your hands and wrists are not meant to be forced into a "straight" line of a straight keyboard. I HIGHLY recommend this style to anyone who spends more than a minute on the computer.
It took me a while to find a driver for it, because it is an old keyboard. But once I got a driver installed, it started working.
I have been using it for a couple of weeks now. I like it.
Microsoft Ergonomic Keyboard with PS/2 plug in not a USB.
Easy to plug in with the PS/2 round pins and not the USB port of which I have none available. Very clean. All the buttons that ergonomic keyboards have and then some. Types silently. Comfortable to use. I love it!