Logitech truly has made a great product with the Cordless Comfort Duo. It finally brings to the wireless table a full-featured, wireless, split-key design combo. The keyboard is truly a joy to use, in fact, I find it even more comfortable than my MX Duo's keyboard, even if it isn't as full-featured. The mouse, on the other hand, is rather basic, but it gets the job done pretty well, just without the bells and whistles.
My only gripe with this product is the price. It costs about the same as the MX Duo (both have a $99.99 MSRP, though prices in stores may vary), and it's obviously less full-featured. The keyboard IS comfortable to use, so if you can live without the bells and whistles of the MX Duo (along with the recharger on the MX700), your hands will surely thank you for buying the Cordless Comfort Duo. If you're comfortable with the layout of keyboards that are not split-key (like I am, personally...my normal Elite Cordless keyboard works fine for me), or if you just loathe split-key designs in general, you're probably best off with the MX Duo.
Give the Cordless Comfort Duo a chance before you take it off your list because it's split key. Unlike some other makers, Logitech has made the transition to a split-key keyboard almost seamless with the design of this keyboard. I still haven't gotten used to the MS Natural keyboard, even after using it on and off at others' computers, but as soon as I picked up the Cordless Comfort keyboard, I had no problems with it (aside from the notorious layout of the Home/End/etc keys..).
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