My main OS is Pinguy OS what is a Linux OS. Everything is working fine except the programmable S1 - S6 keys, the bank switcher ("123"-key) and the record key. As I do my gaming in Windows this isn't really an issue. As a gaming keyboard it works really well. You can press multiple keys without any ghosting.
The back lights work really well. When its light the letters are very clear to see and when it starts to get darker you start to see the keys glow red. So the back-light works really well unlike other back lit keyboards where they are only really viewable when its dark. It doesn't matter with this keyboard its easy to see if its dark or light.
Now for the bad points. The keyboard feels a bit cheap. It has glossy keys and the back legs just level out the keyboard. It makes it flat not raised. Something that doesn't feel that nice. I like to have the back of the keyboard higher then the front. The wrist rest is pretty bad to, it hurts your wrists after awhile of typing. The keys are pretty quiet to type on but its not silent. Its quieter then my older keyboard.
Its an awesome gaming keyboard but not a great everyday keyboard. I mainly got this for the lit up keys and I can't complain about that. The back lit keys work really well.