Summary: The space bar on this keyboard is defective by design. Do not purchase this keyboard. This is a 120 dollar keyboard with a space bar that only works consistently if you hit it precisely in the MIDDLE of the space bar. This is fine and dandy and proves to be no problem at all if you are typing text, but if you are GAMING, you're gonna be hitting the very left tip of the space bar with your left hand on WASD.
Summary: I have a Logitech mouse and speakers and love them so I figured this would be a good purchase. It was not. The back lights were way to dim, almost couldn't see them even in the dark. I was also lucky enough to get a defective one that unregistered that I was holding down a key while I was holding it down so I would be running for cover then just stop out in the open like a noob. I confirmed this by opening notepad and holding down a key.
Summary: Bought this as an "Upgrade" to my V1 G15, I've never been so disappointed. Never had an issue with G15 or G5 mouse, hooked up the G510 and on start up the computer wouldn't recognize there was a keyboard ( EVGA 780i FTW w/ Win 7 64bit). Used another keyboard to get to windows and the 510 would work. in game it was ok but I really had to press the keys to get any response.
Summary: Bought this for use at work, I'm a programmer. Keys started sticking within the first week. I love Logitech products, and have 2 other models I use for work... but this model, the G510, totally sux.
Summary: Keyboard worked great on my first computer, I bought a new computer and when I plugged it in windows said the usb device was malfunctioning. Then it wouldn't work in any computer. I've seen a ton of posts on the forums about this, and tried every single fix I could find, but it will not stay on for more than a few seconds before it says its malfunctioning. Also the extra keys on the side are very annoying unless you're an MMO player.
Summary: I've only been using the keyboard for about 30 minutes. So I was in a game when I started noticing that the spacebar was working strangely. Sometimes it wouldn't register a spacebar press unless I tapped it quite hard. As I am typing this review, it's double spacing a lot. Needless to say, this thing is going back. Keys feel mushy to me.
This keyboard has KNOWN ISSUES with the spacebar...DO NOT BUY
M. Sullivan "MrMagooAZ", Amazon
15 March 2012
Summary: DO NOT BUY THIS KEYBOARD!!! This keyboard has known issues with the space bar, where it will randomly give you two spaces instead of one when pressed. A Google search will reveal many posts on message boards, including Logitech's customer forums. I had this issue and tested this on several computers, then did a warranty replacement...TWICE. Each keyboard they sent me had the exact same issue as the original.
Summary: Period the letters are way to small to read in good light,but just wait till things get darker and you will need a flash light to read the letters. The back light is so dim with no way to brighten. If you need a keyboard that is easy to see and use this is NOT it... I also have MANY other Logitec products I love but this one SUX...