The switch between the 3 Bluetooth devices is fast and life-changing when you have multiple devices (PC windows, android smartphone ...) at home.
The typing comfort is top and really does not make a lot of noise (usable quiet on the train ..)
I only regret the absence of a USB port (but in addition to the backlight, it would become very energy of any more ...)
Note that the keyboard is used when in load (mini usb).