Pros: Great keystroke, multimedia keys, wireless, backlight, sleek design
Cons: No RGB
Especially the great keystroke both for writing and casual gaming got me to this keyboard, since i bought it for writing my thesis. I can't evaluate pro-gaming needs since I don't consider myself a pro-gamer.
The connection is super fast and easy to set up with Logitech's Unifying Adapter. The multimedia keys come in really handy, especially the sound and calculator buttons.
The backlight brightness is adjustable and automatically turns on when you hover your hands above it. The battery lasts about a month during regular use.
Qualitywise the keyboard makes a really good impression. Haven't had any problems in 1 year.
The only thing "missing" would be an RGB backlight.