I have been using the new Logitech Illuminated MXKS keyboard and MX Mouse 3S for over a month now. I also purchased a keyboard for my wife. We both find the illuminated keyboard a great benefit but I understood that the keys should illuminate when one's hands are over them - just prior to touching . The illumination is a bit slow and sometimes requires a touch of a key before ir switches on.
The mouse is great - feels comfortable and easy to use. It certainly lasts a long time on battery power.
Excellent products and with USB C becoming prominent on laptops and PCs in general the use of bluetooth is a great idea, saving ports.