My rented apartment has switches that presumably use radio to turn on and off the lights.

There is no further integration, or smart app etc.

I can't see which light switch is on or off, so even after years living here I mix up some of the switches.

Sometimes the radio pulse doesn't register, so I have to go back to the switch and press it again.

After pressing the switch, there's a perceivable, variable delay for the light to come on.

Guests are confused.

There are only downsides with such a system.