I want one of these keyboard ever since the first wave be release . I be really happy that I wait until now to buy this new keyboard . one of the thing I be worry about be the key noise which be rather loud in the previous version of the keyboard -lrb- I try a wire wave before -rrb- but I gotta admit they work that out really nicely ` cuz this keyboard be really quite . the keyboard be really comfortable and not just because of it be wave design , but the key 's size and the cushion palm rest be soft enough for you to want to spend the rest of the day on it yet stiff enough to give you hand a nice grip . I really like the multimedia key on the keyboard , I actually use most of they specially the 3 function from f4-f6 that be open for you to place whatever you want . -lrb- one other thing I change be the `` Launch Program '' key to launch flip 3d instead of Logitech 's application switcher , just put this on the `` program '' text field : '' % windir % \ system32 \ rundll32 . exe dwmapus . dll # 105 '' without the quote . there be two thing that I have to get use to : this keyboard split the f key into 4 group of 3 instead of 3 group of 4 . so I would automatically move my finger to the last key on the first group which would normally be f4 and find myself hit the f3 key . something else that I have to get use to be the disposition of the `` delete\/home\/end \/ page up and down '' key group , but that be just something personal , I like the old form factor where all key be the same size and you get 2 row + 3 column . something i really do not like about the keyboard be the fact that it have no on-keyboard indicator of any lock -lrb- not that I be miss the scroll lock one -rrb- and even though you get the on-screen indicator when you press the button , you have no way for know right way which state they be in , even worse be the fact that you get no on-screen indicator when in the window log-in screen , therefore know when you be typing number be a trial and error process , really uncomfortable for password with number . another thing I do not like but I think with time I might use to ... be the placement of the context menu key , seem too far way , perhaps if it work with only one key press I would not mind the distance . I also love the fact that it come with a unifying receiver -lrb- which be a key reason for my purchase -rrb- because I own , besides a Logitech Anywhere MX Mouse , a DELL XPS m1530 and these only come with 3 usb port ... so keyboard + mouse + phone charging = no free port for the usb drive . now I can use both mouse and keyboard use just one usb port . overall this be a excellent keyboard with minor detail and some thing to get use to .