Zamel participated in the trade fair Light&Building! #BeElectrified

Zamel has a pretty good EXTA FREE system, the remote controls/wall-mounted pushbuttons are robust and aesthetically pleasing + the receivers are in the box.

And! wrote:

Zamel has a pretty good EXTA FREE system, the remote controls/wall-mounted pushbuttons are robust and aesthetically pleasing + in-wall receivers.

I would argue strongly. The system is quite tedious to program and use. Every time to reprogram something or add another remote, you have to unscrew the boxes to physically get to the receiver and press the programming button. There is no way to program further remotes using another already registered remote.

Another thing is to program monostable timed switches. I have a number of LED lights in my yard which I want to switch on and off with a single button, but with the possibility of the lights turning off automatically after, say, 1-2 hours if someone forgets to switch them off. To programme this switch-off time, you have to wait as long as the switch-off delay time (after how long you want the lighting to be switched off).
Otherwise, this time function can only be assigned to wireless remote controls, but unfortunately it no longer works with wired control. It happened many times that someone switched the lighting with a wired switch and the lighting was on all night or all day, where everyone is used to the fact that by switching on the remote control, the lighting will go out.

The system has a fairly poor range, especially when the modules are inside the house, and we want to control from the outside. This is quite annoying, because when driving into the backyard I turn the car in the yard about 30-40m from the garage in order to drive to the garage in reverse. I have remote controls in each car so that I can light up the yard. Unfortunately the modules, which are inside the house only receive a signal when you get to the place where the modules are mounted at a distance of 10-15m and you still sometimes have to combine the remote control by setting it in different positions to finally get the receiver.

No low battery indication in the remote controls. I have already had the situation that 2 modules were considered defective when, using several remote controls, they started to fail. On the remotes, the LEDs were indicating that a signal was being sent, and the modules were receiving a signal once and not once. It turned out that the batteries in all the remote controls started to run down at around the same time and so the modules started to work once and then not.

The most annoying thing is a fault in the programming of the modules.
I have 4-button remote controls. Each button is programmed to switch on/off a different lighting circuit on 2 different ROP-02 modules
When I have a circuit switched on on one of the modules and I switch on circuits on the other ROP-02 module using the remote control, then at the moment of switching on a circuit on the second module, it can switch off the circuit switched on on the first module. This happens in a random manner.

To sum up, my opinion is that these are just toys quite annoying to use.

It's true, any addition of a remote requires pressing the red button on the module in the box,
but I like the remotes, they are durable have some sealing elements and the CR2032 battery will last for several years.