NO! Sometimes the keyboard works....
359278
Sometimes the keyboard and the mouse works.... and sometimes it is very, very sluggish and does not work. Would not purchase this item ever again. It's just not a good product. Extremely frustrating to deal with.
1398116
The space bar from time to time doesn't register, but way better than half my keys not working that the keyboard it replaced was doing to me.
2388414
I wrote the seller asking if I should return the keyboard because a few top numbers were not working. No response back. Now half the keys are not working!
257281
the keyboard works ok. the mouse, on the other hand, is a problem. it randomly loses connection to the universal receiver. and just turning off the mouse and back on does not re-establish the connection. the only way to reconnect is to remove the battery from the mouse and re-insert the battery for the connection to take place.
3176558
got the key board to help me type, it works most of the time, every now and then it won't connect with the device, it's ok for I use it for..
1064731
I purchased this one when my old logitech gaming keyboard was getting bad. When it arrived I set it up and right off the bad it fails to work. After a power cycle it starts to work. Setting up the software is somewhat complex in the fact you have to find which one of the multiple programs controls that aspect (LCD, G Keys, Color, etc.). Once you've done all this it's time to try out a few games, but then you find it likes to flash the "Switch To App" screed on the LCD while idle. It looks like it's glitching. So you do all the thing an I.T. guy does. Power cycles, removal and reinstall of drivers, check the forums (where over 500 people have REPORTED the issue, but Logitech hasn't provided a solution. This product has lost my faith in Logitech.
3591832
when I have both the keyboard and mouse powered on the keyboard does not work. Power off the mouse and the keyboard now works.
I have to upgrade my review, my keyboard now works when it feels like working. Sometimes I cannot get it to type and sometimes it just decides to enter the same character many times. I am returning it and replacing it with a wired keyboard asI have not saved any usb ports by getting it. All I got was a lot of aggrivation
1702227
I am typingii thisi review usinig thiisi keyboard, whiciih II just reciieved thiiis morniing, and Ii ithiink you can guess what the problem isi. II would have really liiked thiisi keyboard otherwise. Siigh.
1134008
the keyboard worked well for a couple of weeks then keys stopped working.  I tried to get it repaired or replaced with the company but they do nothing.  they continue to act as if they do not understand simple English.  They asked what the problem is, I tell them some of the key will not work, others work at times then quit working.  Their solutions.....charge the battery....really that it!! your on your own if you buy this one, neither the company nor Amazon will help you on this one.
4213589
The keys don't always work, you have to press really hard on them to get them to work.  Its ok...
4814154
This is so frustrating.  As I type, it periodically. Adds a period. And starts a new sentence.  Sometimes its fine, and then it randomly starts going wonky.  The case itself is very nice looking, but the purpose of a keyboard is to speed data entry and I find this keyboard slows it down.  I think I will soon. Looking for a. Replacement!
683531
They keyboard just doesn't work.  It goes to sleep every few minutes, and takes seconds to wake up.  You never know when you'll be missing some letters.  Awful.
2152922
This is a fine keyboard - when it works. ~5% of the time, keystrokes will lag 4+ seconds or be dropped entirely. The keyboard is less than a foot from the dongle. It's unclear what causes this behavior or how to recover. I just restarted my macbook & am typing this on the laptop keyboard, because the Logitech keyboard decided not to come to work today.

UPDATE
Updated rating to 2 stars. I opened the 'Logitech Unifying Software' app, and while it was open turned the keyboard off & on, then held down a keyboard key until it acknowledged the keyboard was 'active.' This has restored the keyboard to a working state; if this works whenever it starts to junk out, then having a working remediation is 1000x better. I still have no info about what causes the keyboard to start failing.
4958653
From the getgo I had a keyboard that would constantly shut off and lose connection. I thought it might be the batteries so I changed them 3 times! Didn't work! No I have an aluminum paperweight that sometimes functions as a keyboard
4801956
As a keyboard it works fine but one of the biggest and most annoying drawbacks is that every once in a while it will get stuck in some kind of "windows hotkey" mode at complete random. Very annoying.
3177234
The keyboard stops working randomly and you have to really bang down on the keys. If I could return this, I would.
2253722
The keys do not always work correctly and may type the letter near it. The mouse pad is difficult to use. It does work, but it is frustrating to use if you are typing a document.