I've had a K70 RGB for half a year, no malfunctions, no sign of wear other than the caps starting to get slightly oily. The LEDs are fine even after the constant colour-changing hell I put them through. (I have reactive typing set, so whenever i press a key, a rainbow ripples out from it. It's really trippy when I'm typing, and my mum reckons it'll give me a seizure one day)