Pros It has a power switch on the back, which lets me clean it without typing random letters. The wrist rest part of the keyboard is very comfortable. The batteries seem to last forever. I use it with the Logitech M705 "Marathon Mouse" which works great.
Cons SOmetimes the keys seem to "stick" partway down. It's not one key rubbing against another. Sometimes if I hit a key lightly it won't type the letter. The rest of the keyboard is great but this problem has me a little dissatisfied.
Pros VERY easy to type (comfortably)
Great keyboard shortcuts/customizability
Unifying USB dongle
Easy to use software
Cons Not Mac compatible
Missing 3 Function keys?
Summary I'm a big fan of Logitech products and this new comfort keyboard is one of the best. Coupled with the sleek M505 mouse and unifying receiver, it is a great package. I can see how it would be useful for a laptop user, but I'm using it on my PC at work. Great key feel, lots of shortcuts, superb battery life and more, what's not to like? Not as extremely shaped as the Wave keyboard (have this at home), the layout and customization is just right for me. The software is a breeze to set up as well.
Awesome product Logitech (now make it Mac compatible)!
Pros I like ergo keyboards. This is my second one and its much improved except for being a bit close together for my big hands Mouse is essentially the same as my earlier logitech wireless one, but software is improved for control of mouse.
Cons Set up was not easy, even though K350 was replacement for earlier logitech's. Installation software could not automatically delete the older software, nor overwrite it. Required 4 reboots to uninstall manually the older software.
Summary Set up was not easy, even though K350 was replacement for earlier logitech's. Installation software could not automatically delete the older software, nor overwrite it. Required 4 reboots to uninstall manually the older pieces of software so that this new software would install. AND very tricky to uninstall old software and still have some control over your mouse so that computer was functioning well enough to navigate boot up and new instal.
Pros I liked the idea of the unifying RXvr system, needed to buy new keyboard, old Logitech died after 8 years. Feel is good and functions fine (after I found work around for quirks).
Cons Quirks: Programmable keys don't alway do what they're supposed to. Example: Reprogramed Media Center key to bring up Outlook Email. When pressed for the first time after booting or setting a while it aways brought up Media Center instead.
Summary Trial and error has shown, as found in other forums that keyboard seems to go to sleep while on my desktop pc. Found that if I hit the space bar a time or two, then press my programed keys all is well. Had to get trackball so I could use right hand while in a sling for 3 months. Worked w/friends MS wave and found it uncomfortable, this one feels good, and while stuck with 1 handed typing didn't have trouble with curve. Needed programable keyboard, mouse, and trackball (on same USB port. I did have to go online and get alternate version of software, as version that came with keyboard and trackball wouldn't work, after that it has certainly filled the bill. Side note, now the wife can use the mouse for gaming at the same time I use the trackball, don't have to swap back and forth.
Pros Great keyboard in most regards. Responsive, good battery life, good wireless.
Cons Keyboard letters wear off!
Summary You'd think for $50/60, a keyboard maker would put letters on the keys that wouldn't wear off, wouldn't you? Ridiculous. "N" is gone, "E" and "A" are fading fast, "C", "M" and other high-usage fee showing lots of wear. Maybe Logitech could spend another 5¢ and fix the problem.