This keyboard was fine while it lasted
340321
This keyboard was fine while it lasted. I bought this at PAX east for a pretty high price. It lasted about 3 years until it *fully* died. The cord is terrible. Even while the keyboard was "working" any slight movement would disconnect the keyboard from my computer and reconnect. This is not a good thing while playing games. Even so, I dealt with it for years until recently it just died. It is recognized by the computer as it makes the beeping sound like when you connect any USB device. The 3 lights above the numberpad light up for a few seconds and turn off. Clearly there is power getting to the keyboard. Even while all the keys are not lit, disconnecting it from the computer makes a noise as well. The kicker is the customer service. They said they would not help me with technical support because it is "defective." It wasn't defective for 3 years and suddenly is defective according to them. "It is defective. There is nothing we can do. Anything else?" Not any ideas of ways I could fix it myself or single piece of technical support given. For such a high price I expected better out of the keyboard and the company itself. For the price, go buy a keyboard that will actually last. Will stay away from CM products.
613630
This keyboard worked well for 8 months and then it didnt. The battery is dead and will no longer hold a charge. The cost to replace the battery is the same as getting a new keyboard.
4965465
The keyboard worked for about 6-months, but would randomly turn off/disconnect since i received it.  This wasn't a deal-breaker for me, but about 3 weeks ago, the left 'shift' button failed and hasn't worked since 9which accounts for my poor punctuation0.  i haven't learned how to use the right shift key for all of my capitalization, so there are errors in the grammar of this review.  anyway, this keyboard will probably work as a spare, but not as a primary use keyboard.  i wish i wouldn't have wasted my money on it.
1825646
This is designed to be a gamer's keyboard.  I liked the key travel, I liked the weight (didn't skitter across the desk).
I played ESO about 15 hours a week. That is casual gaming. The keyboard lasted 15 months. Today the 'w' key failed. Many will recognize that as the 'move forward' key. The 'w' started to appear randomly after other keys being pressed. In all situations, like logging in to the system, where the password now always fails.
I am typing this on a 15 year old no-name keyboard (that slides all over the place).
Just FYI
4031470
The keyboard was fantastic until it stopped working after 6 months of use. It still connects fine but the "m", "n", "c", "x", and "z" keys stopped working. Basically the entire bottom row does not work.
127451
I've had this keyboard for a short time and the lights already stopped being able to be changed. I like the style of the keyboard and the fact it is light and compact, but for what I paid I seriously expected it to last longer. At least the blue light still works but none of the rest do.
815241
The keyboard worked perfectly fine until the last 2 weeks. I purchased this case in late September, so it lasted me a few months. It was very efficient, and it even had a wake screen as I opened it up. Kind of annoyed it stopped working- it appears in Bluetooth but it does not connect nor wake the screen anymore. Oh well, thank god I didn't pay much for it. I guess you get what you pay for.
Oh, and since most apps do not rotate when you unlock the screen, you either have to remove the keyboard to use them, or use it sideways, which was kind of annoying.
4053213
It works good, but the keys cant take gaming much, the base of my F key cracked in less than a year
3824151
I bought this keyboard and started using it and it was fine for three weeks, and then with no warning part of the keyboard matrix apparently failed and several keys stopped working.
4872997
For what it is, and the price you pay, it's adequate.

If you're just looking for a keyboard that has pretty colors and will generally output the keystrokes you press, this will work for you.

Pros:
- Pretty Colors
- Large Key Labels

Cons:
- This thing is cheap. Very short life expectancy. Mine broke after 4 months of heavy use.
- LOUD. Do not try to type with this whilst on skype or a conference call.  It is louder than any keyboard I have ever owned.
- While the colors can change, the red is so deep as to be pointless.  It doesn't illuminate much at all.
- Did I mention this thing was loud?

To summarize again, you get what you pay for.  If that's alright with you, this keyboard will bring you some amusement for a few months.
4925610
I made this purchase back on March 22nd. Decent enough keyboard, until today. The Q, A, and Z keys stopped working altogether. I haven't dropped the keyboard or spilled anything on it. Also, I don't heavily type much on the keyboard. So, there is no reason for this thing to fail. Also I just past the return date by 3 days, which basically means I've wasted $27. This is what I get for not investing into a better keyboard I guess. I don't normally write reviews, but I don't want anyone else to run into the same problem as I did. The option for multiple colored lights is awesome, but it's not worth it if the basic functionality doesn't exist. Hope this review helps. -Kezi
1227085
I don't pound on keyboards and I have been typing for decades. I really liked this keyboard and as I write mostly at night, the back-light spoiled me.  Then the "d" key fell off after only a couple of months; that changed my opinion of it, especially when Logitech would not even respond to any requests for information or parts.  Since then I lost two more keys, so I believe it wasn't just one defective key, but a design failure. Since Logitech does not respond, I assume they know about the problem and have chosen to simply ignore it.

I have purchased two more keyboards since this one (not Logitech). The keys stayed on them, but I miss the back-light. Oh well, maybe someone will come up with a working keyboard....this is not it though.
2752569
Keyboard worked fine and the batteries lasted if you are not using it constantly.
3874179
Keyboard stopped being able to connect for about a couple of weeks but now it won't connect at all. Not worth it in the long run.
3895108
It was a great keyboard for the price and for the first 8 months I owned it, however it stopped responding completely after awhile.
2245248
I bought this keyboard because I liked the option of changing the back lighting color.  I've had this keyboard for about two weeks and other than the normal minor annoyance of learning a new keyboard (I mashed a lot of wrong keys getting used to it), I had no trouble and really liked it.  The user manual is short and has some hilarious translations.

Today the left arrow key stopped working when the up arrow is pressed.  They both work fine separately, but not together.  This is a major annoyance when gaming.  I'm going to have to get something different.
2004213
Good keyboard... until it stopped working. Worked for half a year, then would occasionally stop responding, unplug/plugging usually "fixed" it, but then it was just dead.