1 .: the keyboard itself is amazing! Functions etc. is amazing and I am completely satisfied with itself keystroke noise etc..
2 .: I'm better Logitech usual. Maybe I just had bad luck. But it caught me twice, raises doubts about the quality of today's products myself Logitech.
When I received the keyboard for the first time, clamped the left Ctrl key. This broke up again when you use it again from the keyboard draws after.
I thought to myself: that can happen, I do not care. I'll trade a try.
The second keyboard has until now also works flawlessly. I am sometimes happens only here and there that briefly the Start menu has opened, since then I have this keyboard (I was now aware only really). The reason is that I need only very lightly touch the right Windows key in order to trigger. When I press all over, I will resolve it even from 2 times. Once the press in and the second time when it dissolves again. So open and I close the Start menu by pressing a key.
As this is now already the second damaged keyboard of the same model, I'm sometimes assume that no more soo much emphasis is placed on quality control as another 3-4 years ago. I am seriously considering on whether I should even future shopping with Logitech. My old Logitech keyboard was already on the 8-9 years old and works today still better than this one (it was a S500 or something like that - with many multimedia keys etc so no standard 0815 keyboard).
EDIT:
I have now received the meantime delivered the 3rd G510 and this now works without any problems. Had I not had the initial problems, they would have gotten 5 stars. So she manages to reflect the outstanding Amazon Services nevertheless still at 4 stars.