I opted for this, because it is relatively cheap to the other Logitech and not too many frills has (eg touch screen)
She has a key illumination which only reacts when taken in the hand, good.
It runs on regular batteries about 4 months, I personally hate these charging stations and batteries the Tillen over time.
Even better, however, it goes well with my Sanyo Eneloops about 3 months, OPTIMAL !!!
Using the latest programming software one can now even control 8 devices.
