Wow... This set actually rocks! I have never owned a wireless keyboard or mouse that I actually liked. The design was always flawed in some way. This one is almost perfect. I really like the soft wrist rest (yeah yeah, you aren't suppose to use one when you type, whateva). Also, it gives you the comfort of the Microsoft Office keyboards, without as much bulk. The mouse is completely amazing. One of the features the site actually talks about it the comfort for both right and left handed people. I am left handed, and now I actually can use an Explorer mouse. If you are in the market for a new keyboard and mouse set, I do highly recommend this one.
http://www.microsoft.com/hardware/mouseandkeyboard/productdetails.aspx?pid=016