I just got one of these and im a bit disappointed with it. My issues may not bother other people however.
I dont like the aluminium case, its too reflective, I'm going back to a traditionaly boring black keyboard.
The caps lock etc lights are too bright, irritatingly distracting for me.
In addition to this my K60 is not stable, spending 80 quid on a keyboard I dont expect it to be wobbly, so I am hoping to get a refund.