Bought to replace a clacky old keyboard, the first thing to note is that for reasons known only to Logitech, there is NO scroll-lock on the Logitech Media 600 keyboard!! If you use a KVM changeover device that toggles between two PCs by using e.g two taps on the scroll-lock, this keyboard will be useless to you. This keyboard would not even work at all, using my Linksys KVM and a PS/2 - USB adaptor (not supplied). So I need a new USB KVM.
The keyboard is lightweight but smart enough and cheap & cheerful. Main criticisms are the negligible angle adjustment, and the poor-contrast extra legends printed in medium blue on some black F keys might as well be invisible (which they are, in certain lights), which will bother you if you want to figure out some of the F-options designated for Microsoft Office. Would have preferred the LEDs top right not centred, and Logitech has again re-arranged some of the layout in order not to conform with virtually every other keyboard on the market. So to an experienced IT user, this keyboard sometimes hinders as much as it helps, but the hotkeys help compensate a bit. It's fairly quiet and the travel is shallow but it maybe isn't ideal for a speed typist.
The volume control works OK-ish, there is an on-screen software-lag. All the hot keys can be programmed in a variety of ways. I fear the silver colour 'silk screen' print will wear off some minor buttons in no time at all.
I find that USB/ PS2 adaptors often don't work well with fancier keyboards and mice, and furthermore the Mouse and Keyboard options won't display in the Logitech software at all if you don't have full USB connectivity, so forget those trusty old PS/2 adaptors if you have an older PC.
You can re-program one of the keyboard's hot keys to offer a scroll lock, by also plugging into your PC any old second KB that has a scroll-lock (hint: that's MOST of them!), then run the Logitech keyboard software to assign a hot-key (e.g. 'd') - but hit the SCRL of the 2nd keyboard and it will assign that function to the Logitech instead. You can also type osk.exe at the Windows Run line to launch the onscreen accessibility keyboard instead and access keys that way. (Or check Accessibility in the control panel.)
Overall, you get what you pay for, it's perfectly fine for home use and quite versatile as a commodity keyboard slightly better than average. But KVM users beware.