I have the predecessor KEYSONIC KSK-6000 U for many years on a 2nd PC in use, without complaint. Unfortunately, there is this keyboard is no longer for sale. But I'm not a prolific writer. That is why I was delighted to have his successor Keysonic KSK-6001 UELX found, and then even with backlight! The new keyboard is slightly greater, approximately 2 cm in length and width. I wanted enough space to not so great keyboard since at me the mouse is right next to it - both on an extendable board of 56 cm. What is striking is the shorter by about 50 cm USB cable, which I think is not so good; for me it has just as fitted to the PC. Even a brightness control of the backlight would have been useful. I have the new keyboard only been 2 days and am of the opinion that the on / off switch on the lighting time seen not first aroused great confidence. I hope that it will not be so. For night workers might orange LED light was a red o. Been gentler than the upbeat blue light, but that is certainly a matter of opinion. And - you leans back in his chair, does not dazzle the backlight so strong as when you type just above the keyboard.