Summary: Like another user said, the keyboard conked out after two months. As expensive as it is, you'd think it'd last AtLeast a year. THEN Logitech made Me pay S&H to have it repaired under the 3-year warranty. I'll never buy another Logitech device again. This isn't my first bad Logitech experience. On the plus side, the design of the mouse and keyboard are neat,, when they work.
Summary: The keyboard is comfortable with the "wave", unfortunately the layout is not standard (or at least different from the keyboard I'm using at work). For example, I keep pressing F4 instead of F5. The mouse is ok, except that it is a bit small for my hand. Also the acceleration seemed different from my previous mouse (and I verified the settings to make sure they did not change), I needed a couple of weeks to get used to it... Maybe the Logitech software...??
Pros: Keyboard wave is comfortable, wireless.
Cons: Can't get used to the layout of the keyboard
Cons: This keyboard only works intermittently, and will cease to send a signal for many seconds at a time before trying to rush through all my angry key-smashing all at once. Does not make gaming easy, especially since you can't pause while all this is going on
Pros: This was an awsome keyboard when it was new, very quiet and comfortable to type on, and nearly perfectly spaced keys from an ergo standpoint - I have tried and cannot stand to type on those split ergo keyboards so this was originally a perfect compromise. The mouse is decent, and the receiver is small and mine came with an extension cord so I can place the receiver in a wide range of locations.
Cons: The review by Dave is right on, some time ago keys began to stick, esp those on the far left and right of center. I have tested out at over 70 words/minute with 1 error on most keyboards but this one has me going less than 40 with numerous errors due to missed and double keypresses. Sometimes I litterally have to slam the key to get it to move. Typing has gone from being just irritating on this keyboar to downright painful at times. First logitech product I have owned...
Summary: I am a professional English to French translator - I translate over 3000 words per day and for me, a keyboard must become an extension of what my brain wants to direct to the screen (it is part of the concentration process). And after 2 months with this one, I still often lose my concentration because, no matter how much I try, I just can't get used to that keyboard.... I miss my Microsoft 4000 so much :( Nothing wrong with the quality; a Logitech is a Logitech...