1) The Mute, Volume Down, and Volume Up keys all require the user to press a Function key (FN) and then press F10/F11/F12 respectively to activate that function. The key placement it a real pain to quickly control and I truly hate it, it would have been better to use the DEL, END, and PAGE DN with the FN key then you could just use your right thumb on the FN key and your right hand fingers to easily press the three keys. This is my most significant complaint and I'm actually considering shifting back to my old dome keyboard because I do turn the volume up and down frequently. If I can figure out a way to use some hotkey combo or tool to make this work better, I'll do it. I also have an actual rotary volume control on the speaker cable that I could start using again as it provides very fast response times.