Summary: I know i ordered it NOT from amazon... but i used the amazon website so in my head that is amazon. I received the keyboard in 2 days, awesome. I crack it open, the "n" button doesnt work.. the 1 button doesnt work, the enter button doesnt work. I didn't even bother with the macro buttons. Whatever, i call up logitech to make sure i'm not an idiot. They confirm that it is a hardware issue. I fill out the return form on here and guess what? No replacement.
Summary: Defective manufacture. The keyboard offers many features, but does several of the keys and the LCD display are broken. I bought two of these keyboards and the second one has similar issues. I would only buy this if you can find it on sale in the $50-60 range. Otherwise the MSRP is not justified by the poor quality control.
Summary: I returned this keyboard 3 days after purchasing it. The LCD screen was neat and gave some cool info while gaming. This is why I gave it 2 stars instead of 1. The issue I had was with the keys themselves. People who game will know that wasd are used for movement. One really has to hold the key as far down as it will go. if you let up AT ALL even just the slightest bit, the connection is lost.
Summary: While the G keys and other features are nice, the poor setup of the lowly space bar will have you beating your head against it! The space bar seems to have a narrow center actuation point and if you don't hit it dead center it will bind up mid stroke and not perform the action needed! I started using the G510 after my old G15 Ver. 1 died. If your like me, in time, you will get use to its actions and only miss spaces every 100 keystrokes or so!
Summary: I have owned a G15 since the mid-90's and I have never had an issue with it. For the price of the G510, I was expecting the same quality. I thought that it was just me, but after doing a quick google search "g510 spacebar issue," it appears that the spacebar on this keyboard is horribly designed and it will quite often register two keystrokes when pressing it, resulting in many double spaces that I have to keep backspacing.
Pros: looks good, has useful media keys
Cons: spacebar consistently double spaces, headphone jack not so great quality for music
Summary: Mac users: - There are drivers for the LCD panel but they're buggy and won't initialize the LCD all the time especially waking up from sleep mode. The LCD defaults to displaying "G510." - The keyboard takes time to "boot up" and thus you CANNOT select a boot drive when your Mac starts. Holding down the Alt key does nothing. Keep this in mind if you intend to do any dual-booting with Boot Camp partitions.
Pros: Macro keys for gaming and various tasks. I'm using them to launch applications.
Cons: Keys are very mushy and took a bit of getting used to. Thought they'd be better coming from a $20 Microsoft keyboard. Single level on/off for keyboard backlighting. Would NOT buy the keyboard at full retail price and I'd even think twice about buy this keyboard at all... see summary.
Summary: keyboard non responsive after PC in sleep mode. Forums on company site indicate its a widespread and known problem since 2012 but still no fix. Need to program macro to wake it up. Had one other software issue related to Win 8.1,customer support not very helpful. Expected more.
Summary: I was weighing up if I should get the Zalman k400 which is never in stock, Microsoft x4 which has one Illuminated colour or this. I went for this disappointment. The colour customisation is great with brightness and the ability to have almost any colour BUT that's the only thing going for it. -----CONS: 1) The bad was the LCD screen.